In best of series, MMR gains should dynamically match the result of a series. Include an option to input the best of series score at the winner select message. For example in a Best of 5, the series can go 3-0, 3-1, or 3-2. Depending on the result, the MMR gains could be something like 50 for a sweep, 35 for a 3-1, or 20 for a 3-2. This can be adjusted as needed in the mmr change set command