Is the fact that events are still winner take all. If the losing side at least scored some points, they should get like 1/4 the credit of a full win. This would encourage people to at least stay in Ashran instead of leaving to find a new group.
I'm tired of playing with good groups, only to have them become a revolving door once the other team gets the edge from buffs. Once your group is in this state, there's no reason to even play anymore because you'll get crushed where ever you go.
The buff Tenacity system did more harm than good. A good group, no matter how good it is (unless your group is premade), will eventually lose control and fall apart where the other team just wins by default. It's like Blizzard handing teams the win instead of actually earning them.
They should've never added the buff thing from losing events/faction leader and instead given the losing team an opportunity to get some credit towards the quest if they scored a certain number of points during an event.