Besides that small miscalculation, this is super cool Nerdge stuff and I'm practically wetting my pants. I think the most obvious potential issue is 2 map BO3's vs 3map BO3's. A 2 map win should probably give more points than a 3. Alternatively, you can add a penalty for 3map BO3's wins as opposed to 2map wins but I kind of like how simplified your format is and this change could complicate it.
It might not even be necessary to account for 3rd map series since the rounds are being counted for both sides of each team and the losing region gets at least one 10 points bonus even if they lost the 3map bo3 so their region will still gain strength from that. The only issue with that I see is that in a perfect setting, a region who comes 2nd in a tourney might have more points than the 1st place if they won a bunch of 3 map series and the winning team won with only 2 map series and much fewer matches (especially the case for lower brackets). I'm just throwing stuff out there though without working out the kinks and details. Would love to see what other people pick up.