So earlier I was testing out chars in Training with normal grav, MAD (doesn't really make a difference there though, except for messing around with Weegee's sliding), no tripping, Auto-L-Canceling and 15% hitstun.
It feels perfect, I love it so much. It's much like Melee style combos, such as Luigi's Dthrow-->Utilt-->Utilt-->Usmash-->Double Uair on fast fallers (against Ganon for me).
It feels very natural, yet the DI is at the level that good players will be able to DI after the original combo and stop anything further. 10% still feels too little for me.
I suggest people try out 15% in Training, you will love it. The only qualm I have is Fox, who looks like he will be a beast again. His Dair-->Utilt-->repeat combo is good at mid %'s on fast fallers, probably on low %'s against lighter chars.
I'm really liking how this is turning out.