I’ve played it on an i7-3770 w/ GF 1060 and 16 GB RAM - it was completely fine for at 1080p.
As for the game - yeah, it’s kinda OMD 2.5. Which for me was perfectly alright since it had been ages since I played OMD2. Co-op surely makes everything more fun and easier, but I had a good solo time with the game.