No way. I for one don't want to ever have the situation of being stuck a tier or two below "current" without any real way to escape it short of guild hopping. As someone said early on part if the issue with requiring catch-up mechanics is that there's such a jump in iLevel between tiers - if it was much lower then you would not have a problem with it, as there wouldn't be such a huge disparity between them.
Telling people "Sorry, you need to spend time on X and Y content to see Z" isn't going to win anyone over.