We've done O'hana's twice. The first time we had a table that we could see the firepit from (very cool), the second time if they hadn't walked us past it on the way to the table, we'd of never known there was one in the resturant. But we have a view of the castle both times, a few tables back from the windows, I guess we still lucked out, as not every table has a window view either.
As for how the food is cooked, they didn't ask just came through with the spears, they seemed to all be cooked about the same in a general not too done not to undone brown all the way through sort of way.
As for the extra stuff, what they have is someone doing hula hooping, and hula lessons, limbo, and someone playing a ukalaly (Soooo spelled wrong sorry) and that type of thing about every 20 mins or so I'd say, mostly for the kids, but fun to watch. But again I think it depends on where your seated how entertaining this is. The first time we had a great view as they do this near the fire pit, but the second we could hear it and see some of it but not much, mostly just the parade of kids going by for the limbo contest.
Over all it was fun but I'm not sure we'll go back again, as we prefered the way it was before they changed the menu. The new food wasn't really the problem just the way it was served, less fun and seemed a bit rushed, may have just been a busy night but we weren't nearly as impressed as the first time. Aslo really missed the pineapple, and coconut pineapple bread.
Hope this helps
Melissa