Now that I have a bit more time and have watched more of the vids, a more thorough response:
1) Youre very aggressive in trying to muscle your way into your opponent's usual attack windows. That is, after a whiffed attack at point blank range, I usually spot dodge or execute some other defensive manuever since I know a would-be punish is coming - but you often toss out Nayrus or Dsmash instead. Sometimes it works for you, sometimes it doesnt; I was wondering if you could give a little insight into which attacks and/or characters that tactic is effective against, and how you decide whether to try to interrupt or just dodge.
2) Is the purpose of spamming Nair after kills to reset the staleness of your other moves? If so, does that mean you worked out that nair is the best move to 'sacrifice', so to speak?
3) I was just wondering, what control setup do you use?