If it had anything more than 50 perhaps it would be over balanced.
I've done pretty well with the 50 you get. It's nice blasting Vanguards into the next world. I have a long list of paybacks for being blasted and mowed by Vans.
Usually if I'm out in the battle field somewhere, I usually end up killed before I get under 20 anyway. Eventually they get smart and make a concerted effort to find and kill you.
But it is nice to have the 'Finger of God' and just kill whatever you point at. Tower sieges.. mmmmmm