If there is one thing I have learned over the years is that any park really does have the ability to set out to build whatever type of ride they want to, regardless of what their restrictions are, if they really want a certain type of ride, thrill, etc, they will work around those restrictions.
Nemesis is a perfect example of this. There is absolutely no reason, with Nemesis sitting right there being one of the best roller coasters in the world, that Air couldn't have been more intense, that Oblivion couldn't have had a longer track with more elements, and The Smiler couldn't have had a launch instead of a second lift.
These were all "choices" that the park made. The height limit and restrictions are just an excuse, and a bad one at that, for when Alton makes a ride that, on paper and in concept, appears to be amazing, but in practice is just "ok."
--Robb
Robb, from your experience is the real limiting factor budget or management? As far as I have read, the reasons for Oblivions limited layout is due to the cost of digging the tunnel out combined with the cost of a prototype design. I daresay LSM's cost a lot more than Gerstlauers tried and tested vertical lift (even if they do have a new style anti rollback)