This looks like a great change! I'm definitely in favor of keeping PPSC/SWS off the list. To me, sum of squares seems to do everything that PPSC did, without encouraging players to throw solos. Unranked games sound great too. Is it difficult to create unranked games without any points? For example by making the bet size zero?
I would suggest some minor changes to the language. Specifically, I would change
"This setting determines how points are split up if/when the game draws.
In Draw-Size Scoring, the pot is split equally between the remaining players when the game draws (this setting used to be called WTA).
In Sum-of-Squares scoring, the pot is divided depending on how many centers you control when the game draws.
In both Draw-Size Scoring and Sum-of-Squares, any solo winner receieves the whole pot.
Unranked games have no effect on your points at the end of the game; your bet is refunded whether you won, drew or lost.
Default: Draw-Size Scoring"
to
"This setting determines how points are divided when the game ends.
In both Draw-Size Scoring and Sum-of-Squares, any solo winner receives (note:there was a typo here) the whole pot.
In Draw-Size Scoring, the pot is divided equally between the remaining players when the game draws (this setting used to be called WTA).
In Sum-of-Squares scoring, your share of the pot depends on how many centers you control when the game draws. (Note: you could spell this out, i.e. your share of the pot is proportional to the square of the number of centers you control when the game draws).
Unranked games have no effect on your points at the end of the game; your bet is refunded whether you won, drew or lost.
Default: Draw-Size Scoring"