Yes it's the same for all support weapons. You see it more with Soviets because of German high accuracy results in faster kills. If as Soviets you get a German crew in the same situation and you have the firepower, they will do the same annoying thing. It's like that in Coh1 as well, but I think the animations were faster so it was harder to have this single file of death happen.
To my understanding its exactly the same with MG42.
Retreat an MG42 or mortar. Once the guy who carries the weapon dies, it teleports to other crew members. On the other hand, SU support weapons must be manned again before they are able to continue to retreat.
And i forgot: higher DPS, specially on range, makes decrews easier.
Cruzzs Suggestion isn't that good and brings unbalance side effects.
Short squads, with few models will be strongly buffed while large squads with more models will be nerfed.
let's take some random numbers: a 4 models squad vs 6 models squad
A squad: 4 model squads deals 120 dm and have 120 life. Reinforcement cost 40
Each model has 30 life
If a model dies, squad deals 120/4x3 = 90dm and remain 120-30 = 90 life
B Squad: 6 model squads deals 120dm and have 120 life. Reinforcement cost 28
each model has 20 life
If a model dies, squad deals 120/6x5 = 100dm and remain 120-20 = 100 life
It is more or less what we have actually in the game.
Now if we apply Cruzzs Logic, it become's harder to kill a model but as the 6 models squad has lowest life per model he is reaching his limit of 1 life / model faster than the 4 models squad. All B squad's models can die and divide the squad damage before being able to take 1 or 2 models from the A squad.
And it is exactly what happens in COH OF. Large squads can die without killing any models from small squads, just because they weren't able to deal enough damage to the squad
The actual system was used in vCOH which was far more balanced than COH OF.
Last point is about reinforcement, more life your models have, highest is the reinforcement price. But if their reliability increases, the team using A squads is going to save a lot more money than B squad.
ALL units has the same HP. 80hp.
Some units have modified receive accuracy, shocktroops are the only unit which has armor now (i think). Again, this doesn´t increase HP. Similar to vehicle combat, theres a roll that a HIT will "bounce" (deflect).
If you want to make a realistic comparison, you should had put A squad with more DPS and less health (due to less models) and B squad with more health but less DPS. Basically what we have with cons vs grens at mid range barely.
Spreading the DPS of LMG will make squads without specialized weapons have a bit more sustained DPS.
While the long range squad will deal the same amount of damage, it won´t be as quickly mp effective as now.