I don't mean to alarm you here... But that's exactly the purpose of busting a tanks engine. They call it a snare because it traps the tank. It's working as intended.
...and I fully agree here. The problem (imo) begins when you need to repair such tank. Allied factions will have crews, very cheap engineers or many commander abilities (repair stations, conscripts, smoke cover, self repair). They will also have access to crit repairs. They will also be more likely to crit axis vehicles with universal mines that always cripple the engine. There are many different types of snares on allied infantry - often on the same unit that has some form of a hand-held at. It is also important to note that okw will be facing one of the three allied factions or even all of them at the same time.
As okw, you will have to retreat to base or rely on a very expensive unit. The bleed is usually higher for the okw in the repair department. Their sturmpios are just more expensive to buy or reinforce than any other allied repair unit. When vehicles come back to their base to repair there is no bleed on those spawn engineers - true, but so far from the front line there almost always is no bleed anyway even for the regular engies.
To sum up, in real game scenario allies will have their vehicles back on the field much sooner due to all above. It gives KT much less presence than such an expensive vehicle should have comparing it to allied vehicles.
As for allies having more options?.
Stock:
Sov-combat engis
Ost- pios
UKF-sappers
USF-crew, RE
OKW, sturms, mech
Doctrinal:
Sov-con repair, self repair, repair stations (there are a few commanders that even have a combo of 2 of these)
OST-repair bunker
UKF - self repair smoke, advanced cancer repair drones
Okw- critical repair
So the conclusion is that the faction with the most, soviet, picking the right doctrine is tied with okw when they also pick the right doctrine.
Stock okw is tied only with usf, who obviously take the cake due to crews.
OKW doesn't have less options, you are just over extending and refusing to use the options you have.
The manpower economy can literally be subverted via mech truck. No pop cap upkeep nor model bleed. It sounds like you found your solution.
I'm not going to engage this any further and breathe and validity into the notion that of any tank, the heaviest and stock tank should be able to heal itself because repair drones and the best repair squad in the game isn't cutting it.
With this part I don't agree completely. Your conclusions are completely wrong and not based on facts in this case. I really don't know how you can suggest that, for example, USF and OKW are tied in the repair department. Also the suggestions about overextending are completely rubbish imo. As axis you generally have to overextend more than allies due to inferior range on most of their stock vehicles. The fact that they have to rely on armour, not range, makes the problem of repairs even more evident as being outranged they will tank more damage and will need to repair their units more. I don't understand how you can't see the fact that kiting is the best way to lure into mines, handheld ats and at guns range.