I was playing a lot right before the release of the WFA, that was the best period of COH2 I have experienced.
Just removing ISU and Elefant on that moment and the balance would have been perfect.
And yes, WFA destroyed the balance and the fun, making old factions unflexible and rigid to play if they wanted a chance to win the new ones.
Furthermore, I dislike absolutely Relic's approach in balance patches. I'm tired of placing all my hopes in the next patch, just to see that it only changes minor stats and overbuffs and overnerfs stupid things ignoring all the major design issues (Nobody has built a SU76 since release, and that was a year ago. When are you going to fix that unit, Relic?).