As game designers, really, while it's great that players love our stuff, we really need to cherish the one thing we are guaranteed to have from anything we do: learning. The designers from the battleground learned a lot. People external of Blizzard also learned a lot. The players also learned a lot, which is helpful because their feedback from their experiences is useful for everyone.

Shouldn't feel too bad about this. I'm sure the designers know it can be a fun and great map, and will be glad to have the opportunity to work on it again.