Time investment = reward.
I don't see any value to front loading reward benchmarks and degrading the value of subsequent rewards.
Options to help newbies.. sure.. pay to win.
Temporary measures to help bridge the gap between new/flower sniffing players and the 10,000+hour grinders without annoying the long term players that have toiled to get where they are.
Implement options to buy or otherwise earn potions that give temporary buffs that mirror the permanent versions of long term grinding rewards.
Drop unbound potions in chests that give the same bonus type as past lives, useless to those that have the past lives, useful to those that don't.
Could even offer options to Purchase DDO store buff clickies that give timed duration equivalent buffs until they go and grind out the past lives.
and promo these clickies to new accounts/expansion packs, events...
This is a pretty basic template.. Good, Fast, or cheap.. pick 2.
If you dont invest the time, then it should be costly or not as good.