An important distinction is that Commando Glider allows you to reinforce in enemy territory. It's worth keeping the distinction between the two if anything to allow Commando to keep it's identity as the aggressive commander for Brits. I suppose you could give the Commando glider some additional bonus if it needs something to be competitive like ability to air drop medical supplies to support enemy territory attacks.
I think it's much more important to
not give cheap on-field Commando Glider drops to Vanguard Regiment in the first place. It's already got Raid, Vehicle Crew Repairs, a set of skillplanes and a Crocodile.
The HQ Glider worked because it was painfully expensive and gave the relatively lackluster Airlanding Officer first.
I think the HQ Glider should be
just that: an airdropped FRP with medics. Maybe let it
build Commandos when in friendly territory, but it absolutely should
not become Commando Glider Insertion if we want to maintain UKF's commander diversity.
If you replace Vanguard's only weak link with UKF's most meta commander ability you'll never see anything else.