What are the 'issues' Technics have addressed with the new 1200G ?

I'm curious as a number of the previous posts have made reference to that and I was always under the impression that the 12XX's main strength / quality was/is its motor system

I can understand a change of design approach as is generally the case with 'new models / versions' of most things, towards 'improvement' or refinement of how something works which is different to 'issues' ?.....