That Haku match where he uses OD at first didn't seem like it helped that much. I mean, what's the big rush? It's not like, just because you have stars, suddenly you're going to be able to hit them. You're still going to spend a good 10 or more seconds playing neutral either way, and during that time you'll gain stars. When he finally did a combo that used stars, he used like 4 stars, which he would have had anyway if he hadn't used OD. So in the end him using OD made no difference.
I can see how it could be useful, but a lot of the time by the time I actually get in on the opponent I have tons of stars anyway. And now his meter gain is faster.