You make a very valid point and I agree it's easier and perhaps nicer to re-create turn based combat for a small studio/indie group.
On personal level, I don't think mo-cap is required to deliver amazing animation. I believe amazing animator can achieve great realistic result with traditional bone keyframing method.
We are trying to allocate funds to find great animator and programmer to make the battle an enjoyable experience. At the end of the day, we will have to work out our resources and do our best. From there we will see what works and what not.
Hope you have amazing week!