One of the things I miss most from H6 is slow combat. (Yes, I know it still exists for sparring, but in the right situations it was much more fun for real fights too.)
I understand that slow combat got removed because people would sometimes stall until reinforcements arrived, however, there are still situations and players where you trust the other side enough not to abuse it and slow combat is much more satisfying to use and play out in such situtaions.
Therefore I suggest bringing it back for proper fights as an option. You can offer it to people and if they accept you start a fight with them in slow combat. If they decline it just turns into normal fast combat.