I've only played with the Rising Break and Whirlwind kick version, but I'd like to make a suggestion.
Would you be able to add more end lag to the whirlwind kick move in the air? It's kinda spammy as a recovery. Not too much, just enough where he drops a decent distance before he can do anything again.
And for the Hadouken, you plan on using the Lucario-Kirby animation eventually?