It may (or may not, we'll never know) have been a strategic decision at Cakewalk to put their focus on the toy side (e.g. touch, iPad remote, etc) to target mass market / home user / annual upgraders and keep upgrade fees flowing. If so, they'll eventually run off pro users, which are after stability, usability and workflow. You just cannot satisfy users at opposite end of the spectrum.
I've observed similar with other companies (e.g. IK) that release gimmicks instead of serious tools and provide poor/zero support for their other products; I strongly doubt that I'll put more money into their products.
Personally, I can work quite alright with X2a. Pls don't hit me (!?!) but I do get along with it OK (having never used 8.5.3 so there is no comparison). However, what I dread is that the things that work now and didn't until X2null, will be broken again in X2b, X3 or whatever. I'm getting tired of upgrades at all ends (not just Cake) where you can't be sure what you're in for ...