I agree that it would be nice to see a second wave where most of the existing factions get new units/models, particularly the smaller ones.
But, to me, it's critical that these are actually designed to be AoS units, rather than Warcry/Underworlds bands that get ported in. That leads only to disappointment IMO. Take the warcry chaos bands. While I love the models, dumping them into a single warscroll straight sucks. It's clearly because they weren't going to make new sprues or...like put in any effort, but still. With the Cypher Lords, for instance. The Thrallmaster should be a hero, and there should be a unit of Mirrorblades.
(And like, if the faction doesn't need something new, like seraphon, update some of the old stuff that's still in finecast!)