TBH, it's not about the resources but about denying the weapons.
I voted for no, because i don't think it's necessary for balance and right now there's no time to test it.
What i would rather have (this is from when OKW was reworked) is having the resource conversion on themechanisedtruck, but exchanging mp for fuel or munition (instead of swapping each other as it was originally).
Thinking a bit about it this is what i'll like:
-T3 for OKW is split in 2. Gun upgrade and PIV/PV are locked behind 2/3 of the current price of the tech. Obers n JPIV can arrive earlier.
-After 2 trucks have been deployed, mech HQ has access to resource conversion, maybe after getting engineers as a package. You can get T1 + T2 and accelerate your way into T3. I put the 2 truck deployed rule, in order to avoid just rushing mediums with T2 deployed.
-25/30mp per min for either: 4f or 8mu. Cost is been thought with more or less a 10min return comparison with a normal cache and the risks involved with it (cost/return, initial inversion + opportunity cost of engineers).
This way you still have "pseudo" caches for 1v1 and it doesn't affect the economy of teamgames as it would be like Opel blitz, which only affects the one using it.
Anything can deny team weapons, from stealing to shooting at, and both are still favoured because of your squad getting high RA and clumping while making dinstict sounds that can draw a decent opponent artillery fire.
It actually IS necessary, for the same reason okw is not "elite" anymore, they should have bothered testing it. Standardization goes both ways, they cant cherrypick the (again) vet nerf without touching the penalty given for such vet.
You could argue that it wasn't necessary since okw had a better veterancy as asset...
Regarding your option:
1) it doesn't secure any territory, namely cut off, if it is done at pre nerf cost with 200 mp it could be ok, but it shouldn't be locked in mech, other factions can build it at any moment and always regardless of teching.
2) teammates should benefit it Like all allies benefit each other caches.