I know, they should have a template resize like in RCT2's editor. It seems like just a matter of a set invisible boundary. Also, I have a question about something:
Sometimes I build something straight, but then the next vertex I place becomes a really weird and long curve (eg. I build a lifthill midsection, then when I take the vetex add and add it to make the crest, I sometimes have to go to top view to fix a weird curve that I never put there). Is there a reason to this?