Just curious. How many people that have posted on this thread are programmers? I ask because a lot of what these posts look like are speculation at best.
It would be one thing if someone who's actually worked on both platforms for a AAA title said, "yeah, we could have run it at 1080P at 60 FPS, but Microsoft paid for my car, blah blah blah". It's quite another when some guy reads something on a blog somewhere and says "YOU GUYS, PS4 VERSION IS GIMPED BECAUSE PS4 SPECS ARE BETTER!"
This would be like me, being a baseball fan, complaining that since my team didn't trade for a right-handed power bat, they didn't get into the playoffs. Never mind the fact that you need to identify whether or not you actually need that player, finding that player, determining his availability, determining what it would take to trade for that player, determining if you can live with the asking price, determining the potential for the player(s) you'd need to trade away, and if he'll sign a long term contract to stay.
I work in IT. What the fuck do I know about running a baseball franchise?
For all we know, Ubi's decision to run the PS4 version at the same rate as the Xbox may allow the PS4 version to look even better because it has the horsepower to run more features of the engine! IMO, this thread looks like one big circlejerk on why Ubisoft, and by extension, Microsoft, are awful entities despite knowing nothing about what goes into running a game development company.
tl;dr: Just because you're a fan of something doesn't make you an expert on the inner workings of a game development company.