While i am disappointed by UC4 running at 1440p, I don't see an issue with the frame-rate. ND have always been open to a degree of frame-rate variability in their games. Drops in UC4 aren't at all common, but in instances where they believe pushing the physics (or at least giving the player the option too) adds to the experience, they're fine with some mild drops. The Pro could be 10tf and ND would likely still maintain that design philosophy. It's fine for someone to disagree with that philosophy, but that's a different point of discussion to the one at hand.

As for why it runs at 1440p, it seems like time was an issue for ND. They were working on 4 different performance profiles at once (1800pC/60fps + 4k/30fps/2xShadows for TLOU, and 1440p/30fps + 1080p/60fps for UC4's SP and MP), and it appears they were originally targeting a higher resolution for UC4's SP too (DF think 1800pC). In general it seems like they tried to get too much done in too little time.

Anyway, i'd personally recommend holding off judgement. While i think people are justified in being disappointed with Sony (i am too; they should be more rigorous in enforcing their performance policy), these issues being hardware related is unlikely. It's simply too linear an upgrade. The biggest issue developers should be facing is coming to terms with the different relative spec balance, which changes where bottlenecks will turn up (that being an experience problem). Even then though, most developers appear to be fine. It's only a minority of Pro titles showing issues, and in most instances the issues are 'small and fleeting' (to paraphrase DF). In most instances Pro versions have been fine, with a few instances of games actually exceeding expectations. CoD:IW being one such title is certainly surprising

Not so easy... Except nobody except Ubi has had this problem, which they are apparently fixing in patch.
Not so easy... Except other devs are releasing games with MULTIPLE Pro modes prioritising res, FX, fps.

Sony just needs to put their foot down and say,
If you can't meet our basic, straightforward requirements for 1080p/same or higher FPS,
then don't release a version with higher res/fx which later needs to be patched to meet the requirements,
instead release a lower resolution (1080p or 1440p etc) version and later patch it for better resolution/fx.
Literally the only dev that is having problems with the basic req is Ubi.
Ubi doesn't deserve special immunity from Sony's rules, which only mocks the effort and talent of devs who follow the rules.

EDIT: To be fair, it is not talent of Ubi programmers at issue, as seen by them supposedly fixing issue in patch rather quickly,
what is at issue is Ubi management which thinks it fine to release games which haven't met minimum performance spec.
This isn't corner-case bugs discovered some time after release, it is immediateley apparent violation of MINIMUM Sony spec.

Sony needs to tell Ubi that if it releases games that do not meet minimum spec, 
it will need to refund customers' money AND deliver them a fully spec compliant game ASAP.
If that is what it takes for Ubi management to take basic performance seriously.

Didn't answer my question. If you think the Scorpio is going to launch problem free, you're dreaming. I'm sure you'll be in threads excusing it, though. 

And yes, if we were hearing rumors of the PS4 and XBO in 2012, we're going to be hearing them in 2018 for PS5 and XB2, if there is one. Most likely just a few months after the Scorpio's launch. That's called late to the party, regardless of specs.