The outcome of it depends entirely on the intention. In a competitive enviroment, or in a pub enviroment where a pilot's goal is simply doing well, the meta builds will be taken more in the event the enemy happens to have a good counter on the other team for any other ship you may take. However, in a casual enviroment where everyone agrees to fly unorthodox builds in order to surprise eachother and play the game in an alternate way, you would be right. But that in itself requires all pilots to be in line with this idea otherwise you risk being countered by the silly meta mob without even knowing.
Personally, back when Vet games were done often enough for me to catch it, I'd use them as an opportunity to cooperate with my ally towards the game's intended objective just like how I would in competitive. I emphasized on this because everyone in those lobbies were always guaranteed to havea semi-clear idea of what they were doing, and thus trying your best would actualy breed hot competition from both teams. Generally it seemed to me that troll attitudes or builds werent respected very much unless the whole lobby agreed to go 4 munkers or something of the sort. From my perspective, the scenario you're aiming for (Read: One where unique builds are brought without fear of being countered, rather than one where meta builds are brought in fear of being blindpick countered) doesn't really mesh with the intended purpose of vet games and I'd much rather see it as an optional feature in normal lobbies. The problems with vet games have already been explained, mainly touching on how limited it is combined with how optional it is. If you intend to fix the vet games, touch on it's design faults. If you intend to bring blindpicks into the game, that's fine, but that should be the main topic, not it's implementation in vet games. Although it wouldnt hurt to have a vet blindpick lobby, I think it'd be for the best if it was tested/added in advanced lobbies first.