it's a minor thing, but i think that after DP, 6C you can relaunch them with 5C instead of 2B 2C (which may make the combo easier to land).
care with all green, as all saw in mikeZ vid while you are in the super flash bang can buffer his super and hit you.
i'm not sure if it's technical but, try to get better combo after itsuuA on hit :P
about your game plan, i have a feeling that you don't change your play style too much according to your opponents character most of the time you dash forward, or worse (imo at least) try to AD against bang, but the facts are, that he can dash, throw better, and can outpoke you in the air, especially since you don't have your DP there. you have to adapt and seek to use your range advantage over him. (and if you play nu you will seek to get in as much as you etc..)
from my experience against bang, first you should stop him from using those annoying seals. make him whiff with them, litchi has no problem punishing whiff almost at any given range (as you did yourself here and there). and so he will think twice before using any seal. now he will probably look to rush you (since he has almost no tools to turtle), now you can outpoke him to victory.
but i guess that the most important part is not to fight him in his stronger field, where you lack (litch ad game is not so strong, especially without stuff cover).
anyhow, pretty nice litchi, and had me rethinking my moving to noel. (to chicks and i can't decide )
i think i hate you for this