I had an idea while making breakfast and planning the next TR, especially the first time around. You spend quite a bit of time running quests and building gear for your next life while sitting at level 20. Lots of XP never gets collected.
It would be nice if you could build up an XP bank for the first 5-10 levels of XP for TR. It would slow down the XP grind, reduce the complaints of newer players talking about overpowered zerg TR's and make it somewhat quicker.
Just my suggestion.