My opinion after playing the demo up to level 4:
Extremely claustrophic, invisible walls, very small "dungeon" areas that require frequent loading, no jump button or climbing mechanic.
Very shallow RPG elements - you're given a huge skill tree but it appears that all 9 abilities are going to be assigned to you, with you only being able to choose from 3 at a time. Or, it's just three and they level themselves up and you have no choice. it's clear there's three "types" of abilities and all the skills do is tweak them a bit. So there's no way to plan for an epic use of skill points that will unleash some crazy ability combos. The large skill tree appears basically for show, or complexity for complexity's sake while reducing freedom of choice as much as possible.
As small as the areas are, they aren't exceptionally pretty or detailed (XSX), the sound doesn't match the action (the sound of your footsteps in mud for example will continue after you stop walking), the HDR is either poorly implemented or the font chosen for menus is too "thin", and there's something wrong with the aiming. As a Shooter, the shooting seems off.. I'm not sure what it is, but it doesn't work well with a controller.
Finally, the game seems at odds with itself. Almost as if they just added a bunch of game elements together because they had to be there. I've already discussed the "RPG" elements that don't really add very much, and it has also 3rd person cover mechanics, but it doesn't want you to use them. The enemy has plentiful grenades to convince you to ignore cover and there's no health given except for killing enemies (very limited health reg), so you are encouraged to be aggressive and hunt down the enemies. But because the maps themselves are so small, the places for cover serve as unwanted obstacles when you're trying to dodge and roll around quickly as the game seems to want you to play.
I had never heard of this game before I heard there was a demo that was the entire first portion of the game up for free until April 1, so I don't know how long it was in development or if it was supposed to launch for the X/PS years ago? It really seems like it's a pre PS4-Pro/X1X generation game when you combine the visuals with the incredibly small areas and frequent invisible walls. The game mechanics fighting themselves are another issue entirely.
Play the game for free while you can. Maybe revisit it later if it does go to GamePass as is currently rumored.
but difference is size ps5 vs ps4 quite big
