What are you on about?
Only allied infantry got 2x slower veterancy gain, the majority of the allied players right now have vet 1, vet 2 riflemen at most.
Are you referring to my vet 3 sniper?
Mind you, it played 5 games in which it killed an average of 30 infantry...
I would agree though overall, the vet 2 & 3 requirements for some units should be higher.
(I'm thinking certain tanks, elite infantry, etc)