More FM possibilities and ADSR options for 4 thru 6? Mainly to just cut off the sustain so It behaves like a synth and not an organ.

More Organ models like pipes and other missing types? Even CK has some of these even if AWM2. SKpro are pretty realistic types.

I'm not sure what else can be added besides more AWM2 options which would be nice.

I hope they have some big plans for YC expansion and this is not basically the end of it.