If I was to bitch about something... well, 1) Tyranids are probably the most boring enemy to have, even when compared to Daemons 2) even if the game simulates individual models in a unit, there's no mixing weapons, no unit leaders, and no visual variation 3) Intercessors and Hellblasters just can't do melee, which goes against the concept of "Marines are good at everything" and is especially egregious when you're playing Blood Angels, which want nothing more to get stuck in. Granted, "no variation within a unit" and "shooters aren't melee fighters" are, sadly, basically genre-standard sins.
