Crunch-wise, Craftworlds are in a tough spot right now. There's still a few good/hilarious things like Dark Reapers and Crimson Hunter Exarchs left, but the core rules changes in 9th basically killed the last few genuinely good builds Craftworlds had. The biggest problem is that their units are too expensive for what they do at the moment. The Codex will most likely fix this, but some time might pass before it's actually coming out. Maybe it'll be enough time to get the WAACfags to fuck off. Models-wise, I hope you like GW's ancient garbage resin "Fine"cast and even fucking metal models, the switch to plastic hasn't happened for much of their range yet.