What I personally think of your 15 points
1 - Disagree, definitely with the proposed system of flame damage. When it comes to having not enough time to react, the only solution is to scout ahead and ungarrison before they get roasted in buildings. I'm sorry, thats how CoH and CoH2 tends to work, esp since these units specifically hardcounter units in buildings.
2 - Could work, but maybe increase duration of stun as well to compensate.
3 - Yes, in fact, I feel AAA should be taken away along with the ones in base building. You're essentially being rewarded for the wrong things like maintaining your base sector or teching and as a result a lot of Allied air support is nullified while other ppl have to build their own AAA.
4 - Crommie/Sher does work against OKW base defences because you can shoot the base defences out, they're really squishy. To not expect a 20mm or 33mm gun to have some pennetration potential though is historically inaccurate.
5 - Maybe the ridiculously strong ones like Railway or air strafe but most can be targeted in Axis bases, especially Soviet ones. I'd be happy if they took Railway out of "can be placed in Allied base" though.
6 - Nope, LEIG has been nerfed already. And emplacements are still going to be useful because it takes ages for emplacements to die to LEIG. At the end of the day, LEIG can be decrewed easily if out of position, emplacements can invariably never be decrewed.
7 - Yeah that'll be good
8 - Rocket Arty and Arty in general are in a bad place in the game. Units like Katy simply do not do their job. I feel that damage output of the Katy should be buffed, but I feel the pzwerfer and stuka should stay as they are and other Allied Rocket arty should catch up to it.
9 - I agree, although truck during construction tends to be easy to damage and kill if overextended.
10 - Shrecks are good, but are more inaccurate than AT. One reason Raks aren't used so much is because that range. But I agree Brit infantry AT abilities are in a bad place right now, an AT nade would be nice on brits.
As to your proposals, probably not, you need some counterplay for inf vs tanks.
11 - Yep, I've always found salvaging team weapons a bizarre ability.
12 - Not really. Kubel now kinda plays like the PE vehicle, and I'm perfectly fine with that. OKW in theory should be about harrassment much like PE was.
13 - Seems a solid propsoal
14 - While I would like it, won't happen. Because in that case, everyone will always be picking hammer due to multiple comets.
15 - Needs some work to discourage blobbing, I disagree with ROF decrease but a received accuracy debuff seems like a good idea.
Thanks, that was good to read