Because WGN America is back, I would say it wasn't DISH who blinked.
I don't think carrying WGNA was the issue. Dish is happy to carry it at the right price.
Dish was unhappy with the price increase and tying it in with the retrans agreement for locals.
If Tribune backed off on the (supposed) big price increase then Dish would have no reason (yet) to not continue to carry it.
But Tribune was asking for a lot more because of the new programming and Dish was saying it's not worth that much yet.
At least that's what I got form the various blurbs to the press.