From my test games with the winter mod, I don't think UKF will be anywhere near the power level of USF and Soviets in 1v1 and to a lesser extend in 2v2. The basic problems of UKF will not change. They will still be very good against OKW on open long-range maps and will still suck against Wehrmacht in general and also suck vs OKW on maps with lots of shot-blockers like Kholodny, Elst, etc. I really don't think they will change that much.
4 Cons into T70 or USF rifle spam with Pak Howi + LV is still going to be way better than anything UKF can come up with.
The basic UKF problem is the starting 4 man sections are garbage, which will never change because they keep not addressing the issue. They should just make Sections 5 men from the start and have bolster affect all other squads and weapon crews.