Rega is definitively not a table for somebody who likes tweaking and experimenting a lot ,however I totally buy into Roy Gandy's philosophy of rigidness and simplicity.
Simplicity is VTA on the fly and any proper tonearm must have it, it is not about tweaking, it's about proper cartridge adjustment. It's basic option that every tonearm must have and nearly all Japanese tonearms have it (at least VTA adjustment option). It's so weird that user can't even change the thickness of the mat on those Rega turntables. However, they do not recommend to change their mat as far as i know (same about their cartridge which is definitely not the best cartridge at all). So many limitations for Rega users, strangely they like to have limitations.