This might be a hot take, and don't get me wrong I really love all the new bases we get, but I think it would be nice to add a few less bases every once in a while and instead started adding variations of decor items that are compatible with posed mutations.
Of course I don't want them to fully stop adding new bases or make literally EVERY single piece of decor compatible with posed muts, though I do think it'd be a nice thing to start slowly incorporating, say, every 3 months or so, instead of multiple new monthly bases we could get one new base and a few updated decor items compatible with muts instead.
It's frustrating always having to rely on custom decors, especially if you have official decors that you really like but just can't use on the lion you want to use it on simply because it doesn't fit their pose, and the community hasn't made a custom version of the decor for mutations yet. Event shop decors are fun, but knowing that I'll be unable to decorate my favorite lions with certain pieces of decor that I know would look great on them is always a bit discouraging to me.

I know it's an issue that's existed essentially as long as posed mutations were first introduced, but I just think that especially since it's existed for so long that it could slowly start to be "fixed" by adding a few mutation variants of already existing decors(or at least just brute force the decors on the piece of the lions body where they belong, doesn't even need to be a whole new sprite, I'm just a bit tired of stuff like the butt halo happening lol)