As you said, I think your idea is super complicated for something that is not an issue anyway, BUT:
I actually like the idea of giving the capture bonus to the officer. Maybe even as an ability: officer unit and IS sections in a certain range get increased capture/decapture rates for some time. Arbitrarily I'll just pick for 30 seconds or so. Then make the ability relatively cheap for 30 mun. Would not promote blobbing (rather even spreading out units) and the officer has a utility ability that would be in line of a "command" unit. This ability would also be relatively useless in a game with constant fights, but if you manage to win a bigger battle you can capitalize quickly by activating it and decapping a couple of points quickly.
I mean, I don't think it's THAT complicated a suggestion, It's not too much removed from adding further "upgrade" options to Tommies. The Assault Officer is a nice platform for somewhat more meaningful abilities/upgrades to than Tommies, due to his status as an "unique" unit.
He would also be a good candidate for the UKF's smoke calldown ability, rather than giving it to Tommies, incidentally.