The game feels and looks great on ps5. I have had slight issues with frame rates at times but very quick for a lot of action at once. I believe this happens because in areas that are respawn points for enemies(bases surrounded by red) the respawn happens so fast that you could sit for hours killing the same enemies that respawn. It would be nice to ha e a delayed respawn timer so you can at least inspect the area for boxes and supplies and no constantly be in a gun fight. A prime example are sniper towers, I kill a sniper turn my back for 1 second turn around and another sniper has respawned in same tower.
I am an explorer at heart and don't do missions at first I like to explore and find things before the game helps you with their locations. Other than this explanation the game is feels great after only doing the first island.