I still cant see how this will work...
so assuming 3 players are in view of the one initiating slowmo, thus these guys will all be in slowmo.
so now another player comes around a corner into the slowmo fight, does he also now engage in slowmo, or will he be like, "sweet! floating fodder!" and blast all slowmo-ers easily.
If, as per the above statement, someone walks in on slowmo, and it automatically engages slowmo, there will be a chain reaction of slowmo happening as player X slowmo, player Y slowmo with, then player A walks in on it and slowmo's, player B is in view of player A, thus HE slowmo's, etc, etc...
i'm sure they thought about it carefully, but it just doesnt make sense yet...