It is either the way it is working now, or @Rizos suggestion. I can understand some of my nuker friends that are already bored of being nukers, that want to play something else and can not / dont want to star a new char from 0. And i understand those who did start a new char from 0 and would be unfair for them to get ride of the tiers now. In order to satisfy both, there should be a penalty to pay, it could be lvls cost, higher $ for changing to a higher tier and so on. The question would be how much is that penalty. How much lvls/$ would be enough to pay for the potential xp difference between a higher and a lower tier in each case, how to calculate it in order to be fair with the higher tier as well