And why something that wasn't a problem since release becomes SUDDENLY a problem so it deserves a nerf? Resource changes have nothing to do with there is no correlation. How has increased fuel income any effect on a situation where you got flanked and lost your team weapon? It was the same case before the changes.
The crew weapon vapourisation feature was always been a headache since day one of WFA but I would hazard to say that no one complained (or at that I can recall) because it was necessary feature for the resource starved faction. If the ability had nothing to do with resources and OKW were not resource starved then people might well have complained.
The situation has changed now because OKW has changed, its no longer resource starved and so its vechiles and weapon upgrades arrive sooner and are more abundant.
On the other hand Allies need to rely more on weapon teams to stem the tide, especially against vechiles.
OKW need not fight for scraps to get ahead and have retained a lot of their other bonus features so why should they retain the ability to so easily deny crew weapons (and gain reasources in the process) without having to do extra work to destroy it or use population by stealing it?
Flanking and killing a weapon crew, with the option of stealing it, is its own reward.