I don't think anyone here has a problem with the idea of increasing the capacity, and extending the ride length. The problems come in with the reality of the thing. Right now the track is a circle that encapsulates the whole kids area. To expand the ride they would need to barge into one of the two spaces that could take a brand new ride, which could severely limit their options. If the capacity problems could have been solved by just changing out the RVs it would have been done a long time ago. Basically instead of fixing what they already have, they would need to knock it down and start again to achieve that. So you can see it would be a bigger hit when eventually they build 2 brand new rides, than 1 brand new ride and a rehash of a ride that is already there.
I am also not 100% sure what you mean. But there are two areas; behind Thunder Falls and the old Triceratops Encounter location. They are somewhere between 1.5 and 2 acres a piece, which could each take a medium sized ride.