I'll agree with you that a decently-sized gap between the point based ranks and the numerical ranks should exist. However, a 20k point gap is overkill. Even with the addition of 2 new ranks, there's still an 8k point gap. You would still have to more than double your current points to rank up (from 6k), which should be enough of a gap to feel satisfaction.

And I agree with you about players coming from other games since they can gain points faster, but what about the occasional new player?