Other than the Crusade Air Dodge having you act an attack out of it quickly, I have a few other neat suggestions:
-In the main menu, you should have stars that move around at random directions in the background and in random amounts and speeds.
-Whenever the opponent is hit with a very strong, guaranteed KO attack, there should be a moment where that area goes into a "Negative Zone", with an accompanying fading out and fading in of the music and an accompanying raising and lowering sound. It would add some neat effects to the way the opponent is KO'd, and give it a dramatic effect no less.
-If I were to change up the Screen KO, it'd be to where the screen cracks temporarily whenever the opponent hits it, and has an accompanying 'glass crack' sound. Just make sure to make it quick no less.
-Lastly, this is a stretch, but add an Ultra Combo. The Ultra Combo Meter is one where you'd have to take pure damage and at the end of it, you get to unleash a wave of the character's normal and special attacks; the Ultra is more powerful than a Final Smash. It's a stretch and likely not to get in anyways, but would add a fun new thing and could be a selection similar to how you can select Air Dodges, where you can select between Final Smashes and Ultra Combos.
Now as for character changes, I think may have to post them on the Crusade Forums completely, because I shouldn't try fitting it all here.