They ARE NOT RELEASING CONTENT FASTER.
It's amazing how many people believe that they are, but they're not. ALL they've done is split the usual patches into two parts, one with the world content, the other with the raid. For most expansions, we saw patches about every 5 months or so. These had quests, other world content and a raid. In Legion they're delivering patches every 2.5 months with the first half being world content and the second half being the raid. But it's STILL 5 months between, say, 7.1.0 and 7.2.0 or 7.20 and 7.3.0. Likewise it's 5 months from 7.1.5 to 7.2.5 to 7.3.x (the raid patches).
They're releasing the same content, in smaller chunks, more often but we're not getting more content faster.
Look at the screenshot on page 1 - note the gap between announce and beta. They're not doing beta in Dec or January. I'd be surprised if it's earlier than March. An April expansion release is delusional. Some of you do this every expansion and aside from the trollish posts, it amazes me that people continue to ignore what's happened before and argue that 'this time it's different' just because they want it to be.