I really enjoy this game, I have been playing it for a while and it does scratch that SWAT4 itch. Some of my favorite missions are the Voll House, data center, school, and the streamer apartment. Missions like the vineyard, car dealership, and hotel are probably my least favorite. I dont like the layout of those maps, and I don't enjoy the large army of suspects.
My biggest complaint used to be the crackhead "John Wick" AI, but they seem to have fixed that. So now it is the lack of non-lethal options. Or rather, the small number of situations where non-lethal methods are successful. It is entirely possible that this is realistic, and infact that is probably the case, but I like to play in a way that lethal weapons are the absolute last possible option necessary. I am playing a law enforcement game, not a military covert ops game afterall. On the other hand, when SWAT enters a situation, I suppose that all other non-lethal options are probably already exhausted by that point. SWAT is basically the "covert ops military branch" of regular police.
That and performance being very inconsistent. Sometimes even within one mission my framerate goes anywhere from 120 to 20 fps, and it doesn't seem to be completely consistent. It has certainly gotten better over time, but it still needs work.