Excellent changes.
The only thing missing is the UKF special weapons regiment. Miragefla had a buff/bug fix for Hold the Line in his version. This is needed because the ability as it is know is more of a noob trap and will likely just waste 250 munitions for nothing. Also the resupply HT comes way too late at 4 CP and the weapon drop should not require the weapon upgrade at HQ.
Also I would suggest a change to UKF bolster. Make it so you have to pay the normal price for bolster at HQ as it is now. But then make every squad pay 45-60 munitions for the extra model. Make it a weapon upgrade that takes up one slot like the the VSL upgrade for Grenadiers. That makes Bolster cost munitions and prevents UKF players from being able to use muni-based abilities like grenades, off-maps etc so much. It also makes bolstered infantry sections come later. It also prevents 5 man 2x bren squads.
BTW: Both miragefla and you have made these mods and they both are really good, I am confused why the actual balance patches end up being so meh most of the time. Is it just Relic's "scope" or what is the matter?
This would direct weaken Tommies and Tommies ability to assault positions and counter blobs (nade spam has worked for me). This would really hammer the infantry balance. Would some other QoL changes for UKF be in order? Buff the MG, make the Bren gun usable while walking, or (heresy i know) give sections a snare. Or, maybe a big ask, make the sections 7 pop instead of 8 as they lose "elite infantry" status.