I understand there are rendering limits. However, if the game can render taxi trips, they should be able to render faster speeders. Will SWTOR ever be released in a 64-bit version? That may help game performance overall.
Activation zones are another issue. On Ziost, in the People's Tower Plaza, there is the Custom Speeder, which gave me this idea in the first place. That Custom Speeder invalidates the activation zone issue, since the possessed mobs attack if you get too close with the Custom Speeder - even at increased speed.
There are plenty of huge areas, like the Dune Sea on Tatooine, where there are no activation zones and only one taxi. However, that activation zone is still an issue. So, why not restrict that the same way regular mounts are treated today?
So, let's compare this to normal speeder travel. When you enter an activation/phased area, a message appears:
Mounts are not allowed here. You will be
dismounted if you don't turn around!
A similar mechanism can be implemented for faster speeder travel. Let's say you're traveling faster than 110% when you hit an activation area. A message could appear on the screen:
Mounts are automatically reduced to 110% in this area!