Wow.. I wonder how it'll affect the game balance once they fix it, since all this time we've been playing thinking with 0 vet bonuses.
Actually not that much. The soviets will probably feel more powerful in late game, grenadiers will actually kill riflemen and brits can actually use stock infantry for fighting. Until few days ago defensive buffs were working correctly (except brits) and the loss of offensive veterancy was often not that noticable as the weapon upgrades were always transfered to the oldest squad member.