Just saw this question while looking for something else, so sorry for a long delay!
The only thing I can think of would be to associate your Revision in the title block to a different custom property. eg TitleBlockRevision.
A change in your revision table would then not affect your title block. However there would be no link when you create "Rev 2" so you would have to update the title block property as well..
I know that is not exactly what you want but it would stop your current frustration.
I am sure that it is still possible I made it work before. Not sure how I did it cause it was a long time ago and it was when rev tables first came out. as long as your talking about using the rev table I know it will work.