Hero Academy wasn't, actually, all about honing your NEXT ability and being awesome. Hikaru's a little disappointed that actual schoolwork's still involved, but at least it means that his life hasn't changed that much, even if it's weird to sometimes accidentally blurt the answer to something out before it's even been asked.
(But at least at Hero Academy he doesn't get sent to the hall for it. It's not like he does it on purpose, jeez.)
The times when it is about honing your ability and being awesome are pretty awesome. Even if Fujiwara-sensei insists Go's the best possible tool.