I am pretty critical so sorry if this comes across as mean.
Confusion never trues into anything. It does creat a disadvantaged state for the opponent however. If they jump, Uair will catch them, nothing, Fair or SB.
Are you claiming to have discovered the Fair combos?
I like the slide tech, I hadn't thought of using that before. Fox can do something similar right?
The jab infinite has been known about for a while. Take a step before the Utilt every once and a while to counteract proper DI. (Outwards)
The confusion thing is interesting, but the second confusion has landing lag annoyingly. A SH confusion autocancels, so it might be possible to autocancels a bit lower.