Just want to add that there are also different versions of the Unreal 4 engine. Even updating a game to a newer Unreal Engine 4 version can take a lot of work and time. Here's Katsuhiro Harada explaining what it would take to update the current Tekken 7 UE4 version to a newer version for Xbox One X: “But It requires a significant update of Unreal (UE version of TK7) for X. With the new hardware, we’ve to change the way access our memory greatly.”

So it's not always as simple as "As long as it's compatible with UE4, it's all fine."
It's possible that the UE4 version they used for Dragon Quest XI took longer to get working properly for their game on Switch.
That's just speculation though. But it's worth considering.

I already posted what Doom requires but it seems you ignored the post. Effects like FOV, motion blur, a new form of AA known as temporal super sampling, better lighting effects, higher quality shadows, good quality particle effects, reflections, well implemented DOF effects, compute shaders, higher quality decal, higher quality occlusion, higher quality textures and animations, physics and so on. DQXI doesn't use many of these even when you compare effects in play in both games like lighting and shadows Doom beats it out but a high margin.

What's ironic is your claim that fps means more demanding is further shot down when you factor in the dynamic resolution of Doom while DQXI is at a set resolution, you simply failed to acknowledge the were a tonne of factors now you're here trying to one with smiley faces in true commando fashion while crying that you've been flamed.

Shouldn't we blame SE instead for not doing basic checks about their game being even compatible on the Switch before announcing it?

You do realize that not having a dynamic resolution when aiming for a given performance puts a different strain on the hardware, right? 

You do realize that you just admitted that Doom does make compromises to reach 60fps. By having its resolution dynamically change to accommodate the targeted framerate. Right?

From the get-go, I was the one saying there are tons of factors to take into account. You were the one who said compromises weren't required. 

Lots of blame to go around, but again...nintendo has a long history of being out of line with what third parties need, this at the end of the day is their platform, they need to make it so third parties can thrive without having to jump through a lot more hoops. 

Look at the strawman specialist in play he doesn't even remember the argument now, you said earlier DQXI is more demanding than doom because of the fps which we all know is complete bullocks. Not once did I mention Doom not needing to compromise visual fidelity to achieve 60fps at this point your desperation is present in trying to fabricate arguments to save face.

I said earlier that with optimisation DQXI could reach 60fps while still looking the same (not compromising visual fidelity) get your head out your ass because now I'm just going to be you're as clueless as the man in the white house here and trying to employ the same tactics as the said clown. The pure fact that you've gone down the route to start making shit up up to save face of your uninformed statement from before is not only outstanding but one I'll pull your card up on even if it leaves you bitter for months to come no wonder you post smiley faces and such in your replies that foolishness has more standing than pure fabrication and twisting.

You're here trying to make demands like some forum mogul but have not displayed a single thing detailing how DQXI is more demanding than Doom all you've done is make an awful declaration on 30fps and have danced around the debate like some fairy trying to look like you have some ground. From the get go your post was DQXI is more demanding because it runs at 30fps that is what you posted if you knew the were other factors you would never have posted it because you would have know that fps is one of a tonne of factors so don't give me that rubbish as after your card got pulled up on it you disappeared like Batman in the Doomsday fight and left VG to carry the debate and he actually brought something to it unlike you who vanished than pops up to post smileys perhaps you should stick to that.

Lots of blame to go around, but again...nintendo has a long history of being out of line with what third parties need, this at the end of the day is their platform, they need to make it so third parties can thrive without having to jump through a lot more hoops. 

I think he's just saying that if Nintendo had released a standard console with architecture similar to the other consoles, this wouldn't have been an issue.
But of course Square Enix should not presume anything about the hardware, and they may not have, considering the official announcement of the game for Switch came after Switch was revealed. Though they seem to have made some miscalculations in regards to engine compatibility.

"Specifically with regards to the development, this game was developed on the Unreal Engine, but the version for Unreal Engine needs to be updated, I suppose, in order to support Switch."
"Unfortunately, the engine was not compatible at first, though Nintendo and Epic were working on it together."

@GoOnKid
The bolded text above might be related to what I said to you earlier about specific versions of UE4.

You still have nothing?

I never said DQ XI or Doom is more demanding than the other. I pointed out how one have no difficulty reaching 60fps while the other is capped at 30, and then asked YOU to explain why you think one is more demanding than the other. All you had were ad hominem and non answers.  

I explained why I'm saying a game reaching 60 fps the way Doom does on PS4 requires to make compromises to reach that target. I explained that games going for 30fps usually do because their requirements are different from games running with ease at 60fps. If Uncharted 4, for example, could have reached 60fps with every other aspects of its visuals intact, you can be sure Naughty Dog would have gone for that. Are you saying that they are not competent for not having reached that? All the different aspects a game requires don't necessarily fall in line with the requirements from games like Doom. 

None of this is taken out of my ass. 

But you keep at it, without providing anything other than a poor temper.