Careful, mentioning any of that gets you branded "a scrub" and that you should "LaB MoRe"
That said, I feel Rain Kick functions pretty how much it has to. It's safe-ish on block (-8 or -9 I think, but with good pushback), leads to his big 2-bar combos and the cancels are good to have if you use them sparringly.
Two things I'd like to see improved in this variation are increased base damage on lift, and the Rain Kick KB should give a free follow up at no meter cost. Seriously, it's rare enough to hit, the damage is ass, but you ALSO have to spend meter for a follow up? The lift KB also has meh damage but at least it gives you a free bounce.