Correct, it will be negative for new players but the whole point is that new players will begin in modern, no new player should be starting in wild. If new players become old players over time, they may transition to wild and buy more wild cards then, but by that stage they are no longer a new player.

I personally think this idea is genius and should have been implemented long ago. I personally can't think of a single downside for the game (and as a wild only player/botter).