4BA is too slow to catch step, you can step and block low.Please correct me if im wrong here.*
I think going from 4BB to 4BA to 4BBK to 4BBA is a decent enough guessing game for both sides. 4BA beats step, 4BBK beats JG punishes, and 4BBA beats out most FC punishes. Idk, I thought his 4B series was worth mentioning because most players have a tough time dealing with it from my expierence. As far as stance transitions goes, i think these are his most useful. (aside from 1B stance loops)
Edit: I know the fact the GI and certain CEs like say NM's, Xiba's and aPat's could probably deal with most if not all these options.