That mechanism would only introduce a faulty 'exclusivity' since registration does not at all discriminate the 'better' players from those otherwise. As a matter of fact, I know of 'better' players (e.g. Laz and Vector from my team alone) who were denied slots. So this lack contributes to an uncompetitive scenario just as much as RNG does (if not more) and reduces it to a game of chance or who can register faster.