Wha? So, the opponent is the one who chooses the buff that Miko gets? First time I've heard of such a mechanic, and this is in a fighting game, of all things.
I also find that gimmick interesting, especially since it's being faithful to the original legend(though you cannot answer any other colors :derp:).
Since both of them are buffs, either one should be a good boost if they're as good as her old Red Mantle. Like mauve said, it may skew things somewhat(depending on which play style the user is comfortable with), but since Miko is pretty well-balanced in general, I think it won't be much of a problem.
I'm actually more worried about how useful it will be though, since the boost duration is
very brief. Only 5 seconds in real life, not game timer, and that is very short. Using it to end a combo will make you lose time while the enemy is stunned. And even when it didn't stun the opponent, you need the Fast Declaration Cancel(FDC,
heh GG) to follow up the wall-slam. The video showcasing it wasn't bad, but I wonder how you can maximize its potential.
Although, that may not be an issue if the duration increases as you gain more occult balls, but we don't know about that yet. Perhaps when you have 3+ balls it'll be more reliable.
Anyway, this gimmick left out the penalty from the last one, so it should level her game and make it more fair now.
Here's what I have something in mind for Miko's Occult.
Suppose that Miko has less health than the (player's) opponent (cuz the computer opponent will likely to instantly select either of it.)
If Miko's (player) opponent decide not to choose either of them and stall until the timer runs low and they win because they have more health, wouldn't it be a little disadvantageous?
I don't think that'll be a problem unless it's in the very last seconds. The default choice is Blue Mantle, and I think you can't exactly confirm it. It will automatically chose the color in around 2 seconds, and I think that's how it'll always be.
In the case you described, the Miko player shouldn't even try to attempt it since going straight-up to combo should be more reliable.