Either way the real problem remains and the quality of gameplay won't really improve. As discussed in other threads: some people just want to play and feat their toons in a way which they consider "right" or "fun" (which of course we all want to have) no matter of the actual performance. Others will simply whine and moan all day and blame it all on gear or maybe even say their class is totally the underdog and another is OMGzors OP uber mega ultra turbo ninja monkey bot on fast forward awesomesauce (You only need one guess...).
Fact remains: they're a shi**y tank and that won't change.
I'd rather not have an aggro tool available at all and make sure that those players that actually DO want to perform get the support they need. Your thread with people to contact about classes is a step in that direction.