Keep in mind I'm a lvl 17 brit main and lvl 16 in OKW. I'm trying to be objective as possible here.
Currently the most popular opening for brits in the Winter Preview atm is Lend Lease Assault Section opening.
BO is as followed: (spawning Tommy), UC/VIckers, Assault Section, Assault Section, vickers/uc, T2/ medics, Assault Officer, AEC.
The problem: Thompson upgrade and Officer comes too early for a faction that has generally a decent mid game with the AEC dominating LV play.
My suggestion: Lock Thompson upgrade after T2 and Lock Assault officer after eithe AEC of Bofors unlock upgrade.
In practice this is an extremely oppresive build order vs okw. In the Past Soviet T1 was a must have vs OKW because of the Clown Car being generally unchallenged for the first couple minutes of the game. In the hands of a professional it is very clear how oppresive it really was to play against. The reworking of PanzerFussis relaly helped combat early LV play like that. Some weaknesses of the Soviet T1 was that it lacked the team weapon tools such as a proper AT gun and a Machinegun.
Lend Lease opening has none of those issues.
Generally OKW relies on its superior manpower to wrestle control of british cutoffs in the beginning of the game. Shown in my own testing and also Tightrope's videoes. Assault Sections can confortabily walk up to Volks Grenadiers and win. This ofc flips the dynamic on its head but Assault sections don't come at any additional cost for their firepower. In fact they are 280mp (the original cost of Sections) Brits MP values and income in the early game hasn't been adjusted at all even after sections got dropped to 270mp alpha price. Meaning opening with Assault sections equals bussiness as usual. Not only that, the UC is generally a vehicle that OKW has a hard time dealing with in the first place requiring the Panzer Fusis to be selected. Panzer Fusis lose to Assault sections hard. Panzer Fusis don't gain any RA until vet 3 and thus suffer a lot from rapid fire close range squads that can shred their lackluster starting RA. And what's worse? The brits actually has a decent MG at T1 and one of the best AT guns in the game.
It's not all doom and gloom ofc but it's very oppresive to fight against. In fact comes Tier two with the assault officer it becomes even more oppresive. Assault Officer comes earlier than Panzergrens Assault Officer loses 1-2 models on average charging on Volks. Assault Officer also has a version of on me that works differently from the Captain On me ability. The USF Captain on me usually forces the targeted friendly squad to sprint rapidly towards the captain. The Ass Officer on me doesn't seem to do that probably cause it'll pull in cover Sections out and no one would want to do that.
Without needing to buy Bolster or weapon racks for firepower upgrades (since Assault sections spawn 5 man and has Thompson upgrades) Brits now have the cheapest LV > into Medium route costing only
Brits fuel cost T2 30 fuel > AEC unlock 15 Fuel > AEC 60 fuel > T3 115 fuel > cromwell 110 fuel = 330 fuel total.
Okw fuel cost Truck 15> Mechanized 45 fuel > Luchs 60 fuel > Truck 15> T4 120> P4 140 = 395 fuel total
I'm not saying these numbers are definitive representation of the all balance of all time but it's worth taking a look at.
Again, not saying this is representative of balance in the winter patch in general but it is rather a case study into a very specifc matchup that I think will be quite one sided.
Assault sections are stronger than their current lend lease format because of timing and no requirements on bolster. It'll be very interesting to see where we end up with a unit that can hold its own vs other cqc squads in the brits roster that isn't limited to one like the assault officer.
There's also great synergy in this build with the buildable T1 medics that can not only heal Assault sections early to reduce their 1 RA bleed but also back cap some points. My thoughts on the medics can be found here https://www.coh2.org/topic/103593/winter-balance-1-2020-feedback-ukf/post/804404
but mostly they are powerful yet buggy.
I want to make brits great again but I doubt giving them an oppresive early game of CQC + long range LV and 11 minute cromwell timings is the way to go.