I agree about the doctrines that I don't comment, but here are the things I want to remark:
Guard Motor Coordination Tactics - The most boring doctrine of all time. Solid Elite Infantry, Solid Elite Armor, Solid abilities, + 1 meme Mortar. Not being touched in anyway despite being incredibly popular.
This commander will be even more useful because of the buff to the RoF of the 120mm barrage ability and the replacement of its Vet1 ability. I don't think it will be a meme mortar after this patch.
Shock Rifle - Untouched, but it's about to be heavily invalidated by Soviet Shock due to the 85 > KV8 and Incendiary Artillery Barrage being trash. (I wholeheartedly recommend a buff for it in some form.)
I don't thing incendiary is trash, but yeah the commander is less attractive than similar ones. The ATG Ambush could be exchanged for something more interesting or maybe just expanded to the stronger Tank hunter Ambush ability. IS-2 could need a little buff on top.
Lend Lease - Being absolutely gutted horribly. Assault Guards change is a buff but ultimately whatever, but losing the ability to expend excess Munitions for Fuel in "Allied Supply Drop" for a 200 MP Opel Blitz is unusable due to how hard you bleed Manpower as the Soviets, the triple heavy Manpower doctrine abilities (Ass Guards, Opel Blitz, DShK.) and how impossible Opel Blitz are to keep alive against competent players, and if the M4C Sherman is getting the same reload nerf that the 76mm Sherman is getting (Which I think it is since they're the same tank unless I'm mistaken?) then it's probably not worth using over 85's or KV1's. This doctrine has nothing worthwhile now in theory since there's a better way to get DShk's too. (Airbourne)
I can see this Commander at 3vs3/4vs4, a gamemode where allies are really struggling. The fuel drop was a meme there because it got always shot down, so I do think exchanging it for the Supply truck was a good move. Super Bazookas are a nice addition for 3v3/4vs4 too. But I agree about the RoF nerf to 76mm, which makes it even more less potent than the strong T34/85. Vs tanks with high armor it still can use its HVAP shells without loosing efficiency, but the nerf to standard shells obviously made it worse vs low armored vehicles/tanks and infantry. 76mm needs an AOE buff to its standard shells for a partly compensation.