Ok, if it is for performance issues I understand...
But I really think you should do something as soon as possible for this, because it is very embarassing for Barbarossa (I have to stop my advance every 2 turns, to wait for the city captured to have 30SP... And since I took the first suburb of Moscow, things were very more difficult, as instantly I got only 1AP instead of 3 or 4...
Anyway, I still don't understand why a unit at the same distance from 2 cities always take supply from the lower city (here Moscow, when the next turn I took another part of the city). My battle for Moscow is becoming very strange and difficult. I am not against challenge, but it is too unpredictable for me (and thinking about taking a city or not, because of supply is giving me a headhache...).
But ok, I will do with it. But please keep in mind for later that it could be improved ! I will be the first interested fot this