I have a few past lives, and so it is 3X the XP to gain a level. Not only that, but tokens of the twelve are not as easy to attain as heart seeds. The end effect is that heroic reincarnations are not really worth the time. I can get an epic reincarnation in half the time, it is not difficult to get two epic levels in a day. In contrast, running quests at higher levels, and in elite and even reaper, it takes almost 20 quests to gain a heroic level. I would like to spend more time in heroic levels, it's just so grindy. There is a very easy fix, just take away the 3X experience penalty, and make it normal XP, and allow us to use our seeds to buy heroic reincarnations. This would especially benefit new players, trying to catch up on past lives.
Ultimately, as things stand, the system has boxed off half of the game. With a few easy fixes, as recommended, there is an incentive to run lower level content.
(Just sayin: If I run 22 Zawabi's revenge in Epic at normal under level 25, I get get about a full bar of XP, if I run the 12 version at level 10 on standard with a first time xp bonus, i get about 1/4 of a bar of xp. They should be the same equivalent reward.)
At any rate, I feel like I am arguing with Al Bundy, because you all want to walk a mile to school uphill in the snow. So I have a counter-proposal. How about we just remove the seeds and commendations, and henceforth all reincarnations will require Tokens of the twelve, and furthermore, after 2 epic or iconic reincarnations, all epic levels will require 3X the xp. Fair is Fair