I've played Imperial Settlers! It's pretty fun!! I like it a lot and it's definitely been one we go to frequently, although not one of our top favs. It's been probably a year or so since I've played it now, just because we've been getting so many NEW games, but it's hella fun.
Biggest drawback for me is that it's up to 4 players. I say this because while strategy-driven and still requiring thought, it's not as intense or heavy as a game like, say, Scythe! So it's a perfect board game night game for those of us who are tired of playing Evolution or Werewolf for the 50th time, you know? Except that there is usually more than 4 of us splitting off from the other group, because our board game nights are usually 10 or more people. Hahaha, so it's drawback is that it's a great board game for game nights, but you're usually gonna have more than 4 people wanting in on it.
I would love to see an expansion for it (maybe there is one, or one in the works, idk) to introduce more faction options. I really only enjoyed two in particular, so if I got one that wasn't one of those, I was kinda bummed. The other ones had strategies that just didn't jive with my playstyle. (In this way, you can see why I like it so much, since I love Scythe! I love differing strategies, asymmetric play, etc.)