Regarding triplet snap in the audio editor, definitely, +1. More generally, any compound time signature.
Also, there have been compound time signature requests in general for a long time. In C10+, has this issue been addressed:
If not, then hopefully soon.
Also, multi track free warp (many prior threads, but for example: Multitrack Free Warping - #3 by glittle - Cubase - Steinberg Forums )
And one more, does this (intelligent folders) work reasonably in C10+: Neuer Controller wäre cool ..... - Auf Deutsch - Steinberg Forums