I generally agree with smooth. I just dont want another fork. I am starting getting bored of cryptos dividing themselves all the time...
please, find a solution

This seems as if we've uncovered something that risks both seriously damaging this coin, and quite possibly creating a fork for no real reason.
Rather than debate amongst just ourselves, why doesn't someone introduce this coin to CN on their forum like I've seen asked many times in the last week?
Following that, perhaps they will be able to help us mold the wheat and chessboard problem into a stretched exponential that more closely matches the bitcoin growth trajectory?
It's clearly not as simple as "change an 18 to a 20 or 21", this requires a pretty detailed analysis that's going to demand more than data tables and 20 hours . . and very likely the experience that naturally came with having discussed this many times over the last two years will be an invaluable insight.
I do have to admit ... choosing Bitcoin's exact path as your desired goal may prove to be an arbitrary choice, as it's not really bounded by natural laws . . but if you're willing to accept that that emission is natural and the correct way a cryptocurrency in 2014+ should progress then by all means make the choice.
I have full confidence in both the intelligence and competence of the present group, that we can avoid a total fork and come out better as a whole. So, please, someone show me that you've at least mentioned this to CN?