Grand Arena Championships – GP Divisions [MEGA]

I think it's pretty reasonable to expect that, if you go from facing 4.5m+ opponents to opponents below that threshold...yeah, the pool of competition is going to be easier. So, no, not Fact.

Your very own cut-n-paste clearly states that players will be able to advance between leagues "once or twice," even if the higher leagues probably won't be accessible due to the length of the exhibition.