Okay, so I was pretty down on the game after the first 40 minutes or so, and my earlier posts reflect that.
I must concede that the game improves manifold after the first hour, especially with regard to the visuals. The first major planet you visit is just gorgeous, lush with detail and sporting atmospheric lighting. It looks stunning... until you move, pan the camera, or engage in combat that is.
Unfortunately, despite the slight improvement after the first level, Nexus just doesn't perform as smoothly as previous games and it hurts the combat as well as the presentation. Everything just feels a tad sluggish. It's not enough to ruin the game, and I can say that it only "chugs" in moments of hectic combat, but I still can't see why this game's (admittedly lovely) visuals can't support a consistent, smooth framerate. There are definitely games that do more, and with better performance. It feels like IG took an easy route here.
With all of that said, I'm enjoying myself more and more and I'm getting over the performance issues. It's great to have Ratchet back.