IFF always have had horrible food (kept trying it and don't know why), but Monster Cafe had good food when it was part of the meal deal.
As for SZ I know the path where Jaws was is narrow but could they put a SZ of some sort there or a haunted path?
I haven't tried doing all the houses after 6:30 but last year starting at 5 for the passholders I had all houses and scare zones plus B&T done by 11 on most nights, never been on a Saturday sense 2006 so I don't know how bad the lines are.
Don't forget that passholders get in the houses early before the park re-opens so 3 houses already have a chunk of people that already done them in the back of the park before the gates open.