Martial Prowess allows a player to reroll all failed fighting attacks (once). This seems like something that could be automated. Something that intercepted the results of the roll (miss) and then just rerolled the same dice again.

The SWADE system is great in FGU. I just have a player with this edge in one of my games and it's a bit of a pain to keep track of. I would happily throw money at someone with the coding skills to make an extension that handled this.