I really like the gamemode where you can play with someone else in the same team. However, it can sometimes be frustrating (which is also part of the fun of course) when your teammate applies a morph you weren't expecting.
A solution for this "problem", or at least it would be a different game mode, might be to give each player its own color, but let them team up for the end result. E.g. blue and red versus white and green. This could enhance the game in several ways: different colors have different start locations or could have the same and the same thought could be used for the final exit: each team has one exit, or each color has its own exit.
Just a thought and interested in your opinion about it!!