For the reasons I outlined in my last post before this, I'd suggest to disable or greatly reduce the ability to manually resupply the factories as long as we still have the current system 
I'd like to add my $0.02 worth on the whole issue of "tactical" supplies, at field level, as opposed to the strats. Running in supps in an M3 certainly does have a noticeable affect, but the "perkie" compensation is barely worth the time and effort involved.
I know, I know, not everyone does it for perkies, but if we take the 10 you get for grabbing the map room as a base, running in supps seems very under-valued. A couple dozen of us were trying to take a nme gv base right in the middle of our territory, and were completely stymied by the M3s getting past us to run in supps.
By the same token, whacking road convoys to keep the field objects down is also hardly worth the time involved. For giggles, I took a Wirbel to shoot up the trucks. Wiped out four entire convoys over however bloody long for the princely total of 2.81 perks.
I've mentioned elsewhere my primeval need to strafe trains, we've been hankering for "destructible" bridges forever, anything to give jabos a worthwhile role in the same way as giving the heavies a worthwhile role in bombing strats.
I guess what I'm saying is, it's not just the strats alone which are worth considering, but the field-level elements as well, and (he said in his "make it so" Captain Picard voice) maps which make best use of all the supply elements.
ah wants mah roads an trucks an bridges an trainz an barges an shippin convoys an C47s like dey used to haz in AW.
Is that really too much to ask?