Just following a trend.
Great for pve, op for pvp. Want to save mana but need to go crazy in pve? Activate Redemption. Focused in pvp? Activate Redemption and you can't die. Side affect is just there to make it less op...but it still is.
It can replace lolwell. Not that there's anything wrong with lolwell, but since it's under appreciated how about we replace it with a more useful talent?