Be interesting to see what screen information was available to the crew. Sounds like they had at least some, presumably from the unaffected busses. If the ESS busses were affected by an electrical fire, could the EECs have been receiving errant signals which led to governor runaway?
From the report it mentioned that the "ECL trim" function was INOP. As the collective control system was attacked with the full output of GEN No.1 ~ 300 AMPS you could probably assume that a lot of items attached to the collective that would have been in the path of least resistance got fried first. Like possibly TQ LIM, RPM, GOV AUTO MANUAL, CLP LVDT etc. so the bets are off that things were going to operate anything close to normal. I am sure that during the investigation they will test just what got connected to what unintentionally.
The crew came up with something that "worked" and full credit for flying the thing all the way to the crash site and not giving up which resulted in the successful outcome. I am sure in the post analysis they will also get to realise just how much luck was on their side as well. So so close and it will take a lot to resolve and some "reassessment" may be required.
It is noted that there was an Alert SB issued to inspect other aircraft yet there are a few paragraphs in CS29 that cover items like this case that come under that old chestnut "extremely improbable" which may need to be looked at more closely.