Bofors and overpowered emplacements occurs when you have no lead game designer because it violates so many basic principles of fundamental balance and fun gameplay.
Tenet 1: Combined Arms should matter and always beat spam of any one unit.
Coh2 at its best at least pays some credence to this idea. But the design of Bofurs completely fails this idea because Bofors counters the units that counters them. It really ridiculous that bofors can counter artillery and paks.
Tenet 2: Balance should favor the player with better micro or better decision making. Emplacement spam design requires something like 4x the apm and much better decision-making from the other guy to stop. It is absurd. It breaks the game. It is cancer game design.
There are also other things to such as emplacements adding another layer on top of map balance that needs to be accounted for. Maps that came out before Brits such as "Road to Kharkov" heavily favor brits so much if they are able to get a bofors on top of your cutoff point. It is rather absurd.
But this is what happens when you don't have a consistent lead game designer in charge of things to make these high-level checks on gameplay and design. It's pretty obvious their strategy is to have a small crew randomly add units and tweaks with the mentality of it "we'll release it and fix it afterwards" which was pretty disastrous with the pathfinding change recently.
You pretty much hit the jackpot in this thread. Emplacements are cancerous due to these reasons. I just recently played a 3v3 where there were 2 brits and both chose the the cancer doctrine. By the time we had 0 VPs left, we destroyed all their emplacements, most of their infantry are gone but it wasn't enough. They had map control because of their cancerous emplacement. It made the game tedious and the emplacements carried them to victory. If VP games had 700 VP, we would have swept that game with 1 VP left (when they would have potentially had 660 or so VP to burn after we annihilated them in a good push). But that's not the case, the game only has 500 VPs and emplacements PROLONGS the game in the British's favor.