i doubt they will stop making packs, we all have our wishlist but i do want the team to take a break from creating packs and work on an already existing packs and refresh them if necessary (especially the elder ones)
and the team should do a overhaul on the basegame too because it's very buggy and all sims react the same even if you try to do the opposite personality traits they have the same moodlet in the end, that's not realistic
the team should work on an already existing packs (basegame too) before creating new packs
as for bands i heard (if not mistaken) it comes out later this year (around october/november) but there are also speculations about having a hotel pack as the possibly next expansion pack but i could be wrong (maybe the combination of the 2 who knows? i doubt it but never say never i guess)