No thanks, been there and done this stuff back when it was relevant; nothing will make me go back and do that stuff again in level-sync. If they decided to do this then I'd quite happily just pass on doing the primal and coil parts, well, I already do but I cherry-pick the super easy ones, so...
Just accept it, nothing they can do will make old content relevant to oldies to help newcomers or force them to do it level-sync in DF. These pointless things they've added so far have only encouraged PF exp-only groups and undersize/unsync runs even more. Then you have mentor roulette which I can safely say is NOT used properly, and by large is not used much at all.
*edit* Also, people grunt and groan when they have to do old content as is, even more so when they see a new person there to potentially make it take longer, then you get the general attitude of speedy-gonzales exploding on people for little mistakes or top-level guy bullying little newblet for a minor offense; is making these people more forced than they already are to mingle with "the great unwashed" by chance really going to be good for either side? I know my answer, a great big no.