Since players are already being paid to play this snoozefest I think anet could hire a few viewbots as well.
10k viewers during 1 month costs around $100, which is relatively cheap compared to the investment on pro league.
Every time a player quits becuase he can’t handle the metagame he could be replaced by a pvp bot. These bots should be coded to navigate through metagame, copy the best builds and spam their heals and dodges inside the nodes.
As soon as every single player has left, the bots should be improved to be able to update metabattle themselves. Then we could also replace casters, developers and even forum users with more bots.
In the end we could have a massively healthy bot league. The total investment of this botleague would be cheap and the publicity as good as the one Pro League currently offers.
That’s my suggestion to improve twitch viewership. Another option would be balancing the game but to be honest that’s not likely to happen.