Couldn't pick classes. The class pref system took a while and when it arrived it didn't do anything at first. Probably discouraged a lot of players
Couldn't get subs. Deal breaker, though I understand why faceit didn't want such a feature with a ladder system and money involved.
Everything else was fine tbh. I enjoyed it for the first week or so, but once the playerbase started dropping you'd often be playing with/against the same players. And it just so happened that I really did not enjoy playing with some of those players. I was already mixing daily with the Dutch circlejerk and I'd occasionally get picked on pugchamp (which generally had more keen and surprisingly more enjoyable people playing). So I stopped queueing faceit