TBH, i'm not sure it would change any much the current meta if Maxims were to be given the vet 1 ability at vet 0 with an increased munition cost.
I don't think we saw any relevant use of Maxim spam during the tournament. Out of 50 games, in the opening, Maxims saw only once as part of a 3 Con opening and twice as a pseudo maxim spam on some weird troll game (CE Maxim x2 Medics Guards and the other one been CE Maxim x3 Partisans).
I don't remember people opening with Maxims in the recent CoHrona cup neither.
At 3:30 you get around 60 muni and most people would opt to go for a flamer. At that point, depending on map resources and control you get around 30/40 muni per min on a 50/50 split.
I know it sounds scary buff and maxims in the same sentence, but anything that discourages spam and A move is welcomed in my book.
I would say i'm optimist at least, due to this:
Forces a reload at the beginning of the ability.
Ability disengages when the unit is told to move
The ability is good, but it's not AP rounds/IR good. It doesn't give Maxims another role (killing light or chipping down pseudo medium vehicles), it just makes it perform as other MG should be.
Other than that and a desperate wish to defile factions designs, I find no reason to vet0 ability maxims, that is my though about it.
If anything, atm, it would be in line with their current design. Check vet 0 flare mortar, vet 0 artillery barrage Zis gun.
NOTE: i don't think Soviets need atm a maxim buff but i don't see the harm in trying something like 30 muni vet 0 and vet 1 reducing the cost on the ability to it's current price.
At the moment i don't see many people using it cause u need to use it preferably BEFORE units get into the arc.