during sukukaja moonsault string if you don't have 50 meter for garudyne or you just choose not to garudyne, j.2B>backdash puts you back in neutral & at a better advantage than your opponent. You can throw out j.5D to force your opponent to block it & dash in for unblockable 2B. the backdash basically gives you more options.
j.C is a great move if you use it correctly. i don't think alot of yosuke players know this (or i just never see them do it) you can airdash & backdash after j.C as well as kunai or moonsault. you have to use it as soon as you come off the ground. after the fan stops spinning is when you can do all that i just mentioned. on top of that, it's got a huge hitbox like some others have already stated so using it after a dp trip, cross up is always good. they might block it, but all blocked moves can be moonsault canceled