Hmmm.  Wonder if it will have touch screen enabled?  Touch screen and mouse are fairly equivalent.  I agree that often games that work well with a mouse don't really translate that well to a console controller.

Heh, I think you just convinced me to play Divinity OS2 instead of Diablo 3.   Divinity OS2 looked really interesting to me, but I stopped paying attention to it when I found out it was on PC only.

If the port cost 2M and took some time, we can say it's easy enough, but not as easy as just recompiling and testing it. We can also say that for a company like Blizzard it's an investment that despite likely moderately profitable, it has some qualities and possible further benefits, low risk, relatively low cost and possible good marketing value for at least two reasons, showing with facts they are willing to support the platform and porting a game that despite quite old now, is still one of the most successful action RPGs ever, loved by reviewers and even more by gamers. If many NS gamers will like it, there will be another benefit, showing the longevity of Blizzard games, a thing well known by PC gamers, less by PS and XB gamers and possibly unknown for Ninty-only gamers (there were previous Blizzard games also on consoles, like Lost Vikings, but Diablo III is the first really big Blizzard game ever ported to consoles).

Well it is true. Xbox 360 and PS3 are slightly weaker then Switch 

But still porting to Switch is actually should have been very very easy. They already has the foundation, the engine and the familiarity with the system and Switch are Nvidia tegra GPU game system. Compared to PS3 and Xbox 360 that are using Exotic CPU and GPU and that was their first attempt. Even if the reason is not enough human resource to porting it , that's just blatant lie, it's like saying they are underestimating Switch and their potential sales and put super small team to porting it.

Diablo is generally a game that tends to garner multiple play throughs.

Game is light enough that it runs fine on PC Handhelds anyway.
But that is certainly a selling point.

It's a Blizzard game.
Even if there is a ton of data on the cart, it will eventually become redundant at some point anyway.

They constantly patch and update their titles even a decade after release... I mean. I don't see the point in owning my StarCraft/StarCraft 2/Diablo/Diablo 2/Diablo 3/Overwatch disks anymore because it still has to download essentially the bulk of the new data anyway.

What will be truly interesting is if the game requires an always-on internet connection like the PC version.

They really aren't... Not even in the same ballpark.

Touch screen is 1:1 movement speed with upwards of 64x64 pixel accuracy.

The mouse can be 10:1 movement speed with pixel perfect accuracy.

Games speak for themselves.
Often switch ports have better fidelity, higher frame-rates, better frame pacing and often better resolution, so  it's not just a "slight" power advantage.

Sounds like these ports take a lot longer than we thought. And with Japanese companies supposedly having not gotten on board until it was clear that Switch was going to be big, it's no wonder we haven't seen much yet, and why it's taken so long to get the Dragon Quest XI port. Seeing as that was 360/PS3 era technology that Diablo 3 was built on, I'd bet Japanese games built for PS4 will probably take even longer to port, so maybe we shouldn't give up hope for Persona 5, or maybe even a toned down version of Final Fantasy XV or Kingdom Hearts 3?

I wouldn't using "slightly " if it's on par with PS4 and Xbox One. If it's PS4 and Xbox One then i will just be using " Better then " instead "slightly better " . Because Switch are still on the same gen graphic with Wii U, PS3 and Xbox 360 . It's matter of language for God Sake, you guys are a bunch of sensitive. 

Maybe in portable mode it's powered that way and I can accept that but in docked mode it's significantly more powerful.

A few ports on Switch haven't had more stable performance. Probably because they tend to scale back 8th gen ports as opposed to improving 7th gen ports. Payday 2 and LA Noire come to mind.

With Diablo III, it will be a scaled back port of the X1/PS4 edition. They aren't improving the resolution and performance of the 7th gen versions for Switch, instead they will scale back the 8th gen versions for Switch.

9 months isn't unreasonable due to this being their first project on the platform and optimization for the hardware. The added content likely isn't much. Its also unlikely they put a big team/resources on this project.