None of these options. What I think is needed is for the finish moves/SK animation sequences to be much faster, they're just too slow for a multiplayer game.
You can see how all the races were modified to fit MP games better(movement speed, health regen, cooldowns, etc.), but the SK/finishing moves were left as they were in SP.
And I'm against removing/turning them off as they are a core gameplay mechanic(at least for the current MP modes).
Unfortunately, modifying animations seems to be very complicated in games.