Update docs/mediums/proportional_representation.md

docs/mediums/proportional_representation.md

@@ -23,8 +23,8 @@ Proportional representation voting systems came about as a reaction to the inacc
 
 * May produce a fractured legislature of too many parties
 * Can create instability due to lack of majority consensus
-* Parties that form coalitions may become incredibly strong and therefore difficult to remove from power
-* Small parties may have exceptional power in tipping a decision between majority parties
+* Parties that form coalitions may become difficult to remove from power
+* Small parties may have disproportional power in tipping a decision between majority parties
 * May create space for extremist parties to gain power
 
 ## Implementations