1. Make the completionist feat free. It is the biggest grind in the game. It requires 48,824,250 xp to acquire, which is the equivalent of capping 25 toons. Furthermore a lot of classes are tight on feats, adding in one more feat to the list makes some builds unviable.
2. Add past life feats for races. Consider the following:
Human PL: +10% Healing amp
H-Elf: +2 to all skills
H-Orc: +2 Damage
Dwarf: +20 HPs
Warforged: +10% Fortification
Drow: Stacking +5 Spell Resistance
Elf: +2 Ranged Damage
Halfling +2 to all saves OR +2 to-hit
These feats would only be a once and done feat, i.e. no stacking 3 dwarven PLs for 60 hps.
3. Once completionist has been acquired, require only 1,900,000 xp to cap from that point forward. PL feats are only worth 1,900,000 xp as it is, we are grinding the additional xp for more build points and progress toward completionist.
3. If the above is not sufficient. I would suggest allowing those that have acquired completionist to be able to choose to leave past life loot in the TR bank until cap has been reached and work on 1st life xp tables.