The other thing you need to 'unbreak High Guard' is a tactical movement system, not as detailed as Newtonian (although it has it be compatible) but allowing for some maneuvering. High Guard 79 had more rules for this than High Guard 80 - my own house rules use range bands...
I tried the range band thing for my unbreaking version which I put up for comment, but really I'm going Newtonian because of the kinetic damage effects of missile impact, which greatly affects maneuvering.
I'm less worried about all the tracking because I anticipate most ships will operate in globular blobs in order to screen damaged/critical support ships plus mutual PD support. So most fleets are going to probably operate in just 2-3 globes plus strike fighters and scouting elements.