It's interesting to go back through older posts and read how iRealb has evolved - especially when everything hit the fan after players "discovered" they could use it on live performances. iRealb is (and I hope will continue to be) first and foremost an educational tool. And while I would never discourage anyone from posting feature requests (I've posted a few myself), some of them seem impractical and are evoked simply because there's a "Play" button. I confess I'm old school and still a bit uncomfortable when tracks replace flesh'n'blood musicians. So I'm probably not as anxious as others for iRealb to play perfectly on every song in every style.

I'm guessing the developers look to the most popular standards to dictate which new style or feature has priority. (For instance On Green Dolphin Street or Star Eyes for the Latin/Swing setting - it's fairly universal to play Latin on the head, swing the bridge, and swing all the solos.) So a new style will do the most good for the most people on most songs. It's also fairly common to double-time solos on a ballad (although I don't particularly care for that custom myself). Anything more complex than that might be desirable on a handful of tunes (Linus and Lucy comes to mind) but otherwise would go unused, therefore the developers' energies would be better focused elsewhere.