A split analysis is a good idea. They could have an expert in each area score.
I think that form truly shapes the outcome such that the better grappler will move and bend and punish the grappler with worse technique.
The same in striking any error in form will be capitalized on like Aldo’s tendency to come in too strong would have cost him the fight later on even if he hadn’t ran in in the first 10 seconds vs McGregor.
If neither person can make significant progress, I agree with you I’d think the points would have to be rewarded to the more aggressive fighter not the guarded defender.