After playing the demos, neither do the Xbox One or PS4.
Again, Episode Duscae doesn't have too many problems running on PS4. There are dips, but for a big portion of the time it maintains a perfectly respectable framerate for a demo of a game 1,5 years from release (there are released, finished games with far worse performance). The dips are mostly to something like 25-27fps, rarely if almost ever going below that, which isn't all that bad. Platinum Demo is a rushed demo by a small team + Tabata said that they had just done some major changes under the hood as they are still working on the game's engine, which they didn't have time to optimize before the release of the demo.
The demo at E3 ran at a mostly stable 30fps on PS4 and IIRC wasn't all that much worse on Xbone either. So PS4 & Xbone are seemingly running it just fine. So stop with the dumb hyperbole.
honestly its more their engine sucks rather than the consoles not being able to handle it
The engine doesn't suck. If they can just polish up the IQ a little bit, it'll be one of the best looking multiplatform games around. I mean, FFXV will be a game with an open world with dynamic day/night cycle, dynamic weather, you can fly high up in the air, some pretty incredible animation work, all kinds of complex simulations in addition to weather & day/night cycle, there are skyscraper-sized monsters/creatures in the middle of huge cities and effects up your ass etc.. That they've seemingly been able to make it run smoothly is no small feat, pretty much the opposite of the engine sucking. Sure, it's no Horizon, but multiplatform games rarely can push hardware quite as hard as exclusive 1st party games.