I definitely agree on the trees. As far as intense rides go, I think the great thing about having 10+ roller coasters is that they all don't have to appeal to the entire group of coaster riders.
KI has already done this with the family and milder thrill segment, (Adventure Express, Backlot) but hasn't put money into the extreme intensity/forces part of the spectrum at KI (which today I'd say consist of mostly RMC's and Intamin).
Just as not every food option is for everyone, I'm ok with not every coaster being for everyone. In the same vane, only a portion of guests go to the waterpark on a consistent basis. Some go all summer, but never go to Haunt. Sometimes one thing you love can be worth more than three things you like.
That would be nice, but a big part of me would like to see something along the lines of the old Keelboat Canal. That would bring a lot of Rivertown feel back to the area. I know water rides are not en vogue right now, but someone has to start any given trend. If I were a betting man though, I would say that the next attraction on that site will utilize that building in some way. It's just too big of an asset to part with.