Iteamize the gain and loss of SP after ranked games so players can be informed as to why/how they recieved/lost the SP that they did.

The reasons for itemized gain and loss would pop up like the xp

Ex: A win might look like

+10: win base line
+5: smaller stack than opponent
+7: 7-2
-5: rank advantage
+11 performance bonus

Or a loss could be

-5: loss base line
-17: 0-7
+3: rank disadvantage
-8: stack size advantage
+2: performance bonus