I, too, would love to see additional themed pool or pools.
The fantastic Kid's Club idea is a great one - perfect pairing with DTD, if you ask me.

We would use it, I'm sure!
I saw someone else suggest a carousel onsite elsewhere. I would love that. Though there is a carousel over at DTD, come to think of it....
Actually, when I was talking with my guide about SSR, he said that there were certain things that they wouldn't be able to do because it would be in competition with things at DTD - like showing free movies in the theater could be percieved as hostile to the big movie-plex across the way that wants to charge money. Good reason or no, it is probably a factor in what they will actually be able to put into practice.... Similarly, an ice cream parlor would be great, but there is Ghiradelli's across the way.
I have never been in it and maybe it is WAY too small, but I think it would be fantastic if they could overhaul that old theater for some sort of dinner show a la Hoop Dee Doo. Some sort of vaudville thing? Just some kind of show, concert series, who knows.
Oh, how fun would it be if they put in gazebo for band concerts? Actually, when I drove by, it did look like they were building some kind of gazebo. When I lived in New England, it seemed like every small town had one and periodically would have concerts from this town band or that town band or sometimes a brass or string quintet.
How about a giant outdoor chess set? Probably not. Indoor ice skating rink? Come on- it could be fun and there isn't another one in all of Walt Disney World, is there?
Seriously, good ideas in this thread, most of them seeming entirely doable, don't you think? Especially the carts. I am in favor of carts!