Booted up the Gamepass version on PC yesterday, and was super disappointed to discover it didn't support Crossplay with Steam. My friend and I ended up using Parsec to play the couch co-op mode on his PC.
A few things that stood out to me:
1. Would be helpful if it would give Player 1 a red laser sight, and Player 2 a blue one (If I recall, Dead Nation on the PS 3/4 did this? And Alien Nation, and Helldivers). Gets a bit chaotic when two players (or more) are shooting in the same direction, standing next to one another - you lose track of your aim with all the red laser beams.
2. Player 1 has a blue circle around him, a red name below his character, and is designated as red on the radar. Player 2 has a red cricle, blue name, is blue on the radar, etc. Why not stick to a single colour for every player? (Not sure if this happened because we were forced to play in couch co-op mode, perhaps the online co-op fixes this).
3. We encountered the "gun won't fire" bug
4. And not sure if this was just a couch co-op thing: But whenever the one player picked up a new piece of clothing/armour (and equipped it), Player 2 would also get it. This made the two models a bit same-y and difficult to distinguish between at times.