Ok, I reran the bonus spreadsheets and a couple of potential issues
The +2 in the 2 region bonus in the SW corner...adding that impassable between Gagarinsky and Ochakovo put the suggested decimal bonus down to 1.5, so 2 is a too high. So, I think you need to either remove that impassable (which messes with the whole 4 corner thing you have going on), or add an extra connection, maybe from Khamovniki to Gagarinsky. Also, if you look, Gagarinski is only attackable from one region, Akademichskiy, which starts as a neutral. That takes that territory out of play from the very beginning.
Additionally, the +2 for the 4 region bonus is also too high as the spreadsheet indicates this should be 1.75. Adding a bridge between Khoroshevo Mnevniki to FIlevskiy Park (which would allow you to make that +3 a +4, since it's 5 regions).
The only other issue I see is that both Khamovniki and Presnensoe border a ton of regions, and both start neutral. I think perhaps inversing the alternation of the neutrals across the inner/outer rings would be very beneficial (except for Zhamoskvorechye and Z.I.).
What do you think cairns?