It isn't a bad idea, in fact there is a few speed Rage-Theatrics hybrids in Blood Gods that have called shots and don't do so bad...

I have one myself, you lose total carnage but get called shot, gratuitous violence and HAMSTRING in compensation which is quite interesting.

From my experience, they perform better against theatrics than pure rages, especially if they hamstring the opponent first before they get hamstrung, but have more trouble breaking down war tanks as they miss the upper rage skills. The last balance pass played against them as it improved TOO MUCH the efficiency of heavy armor against bleeding...