I find it very interesting how often people cry for "shake up the formula, give us something new and fresh".
But every piece of new battle content (content that wasn't present by 2.1 at least) has not been well received.

Hunts, PotD/HoH, Diadem, Eureka, Timeworn Maps.
Timeworn Maps and PotD/HoH being most well received and being entirely optional content.

It's such a contradiction in itself somehow, the same forumla that so many people complain about is at the same time the most popular content.

I'd like to see more responses though.