Any chance of making 2.0 HTML Standards Compliant?
That is the goal. Note the professional theme released with 1.3.10 along with a few other themes out there are all HTML/CSS standards complient (barring non-complient story/comments/etc).
I'd even go a step further and recommend that the default GL2 theme be Section 508 compliant and adhere to other basic web accessiblity standards.
The reason people blame things on previous generations is that there's only one other choice.