Horwath
Legend
early game -5/+10 is too much and late game(if anyone plays it) it's too little, if you expend a feat, you should get more than +0,5 damage per hit.I changed GWM (& SS) so that you drop you PB to hit and gain double that as damage. So, starting off -2 to hit/+4 to damage, doesn't go up to -3 to hit/+6 to damage until 5th level, and maxxes out at -6 to hit +12 to damage. (Of course, I also made similar tweaks to the other styles so they generally get better at higher levels and are dependent on PB).
It's still powerful, but not front-loaded as badly.
solution to make it more broad feat:
-1 attack, +2 melee damage/+3 melee damage with 2Handed melee weapons
5th level: -2 att, +4/+6 dmg
11th level: -3 att, +6/+9 dmg
17th level: -4 att, +8/+12 dmg