Hi Rat and welcome to the forum.
First of all, let me say that I've only owned my Treg for about 2 months now and so there are likely to be more experienced/longer contributing owners on this forum (all due respect guys) but like you my background was originally in vehicle engineering and as a new and otherwise generally happy Treg owner, I'm also concerned by the tyre wear issues (esp in comparison to other lux 4x4s I've owned).
From what I've gleaned in the past few months there are several possible problems and Pilgrim's post at the start of this section of the forum is aimed at adressing these - unfortunately however the whole situation for Treg owners is made worse by the fact that 1) there may be several interrelated probs 2) some of the factory build issues have been addressed on the latest cars 3) the knowledge base at individual dealers seems to vary wildly and (to the best of my knowledge) VW haven't issued an official recall to address these probs.
There are reports of the following:
Prob 1) Crabbing & wheel skipping on tight lock: I believe that as opposed to transmission systems which use open diffs with abs linked intervention to control wheel slip, the Treg uses automatic locking diffs utilising stepper motors to progressively engage lock-up electronically controlled by an ECU which measures wheel slip (but with manual override for centre/rear diffs).
There has been talk of 3 faults 1) Incorrect software - causing transmission wind-up by locking the diffs 2) Stepper motor faults - leading to same 3) A mis-match of components in the transfer box - leading to same. Some contributors here have had software upgrades, new stepper motors, new transfer boxes in an attempt to fix the problems - again build dates seem important in terms of which probs and dealer response is variable.
Prob 2) Excessive tyre wear on outside/inside (or both) shoulders of tyre tread mostly on the front but occasionally all four tyres: Reports on the US VW Vortex forum suggest that during a period of prod'n cars were leaving the factory with incorrect susp alignment - you might like to look at the following page for more info
http://forums.vwvortex.com/zerothread?id=1353913
There was also a VW U.S.A service circular regarding warranty coverage for the tyre wear/mis-alignment issue
http://forums.vwvortex.com/zerothread?id=1386459 which is now in the public domain.
I have no indepth tech knowledge of the Touareg (yet) and the foregoing is just reports & opinion but I hope that it's been some help.