EDI-BER was dropped by Ryanair, who also cancelled a few other routes to Berlin and reduced frequency on most, if not all, of their other routes into Berlin at the same time. I don't imagine EDI-BER will remain vacant for very long.
GLA-BER is still run by easyJet, so not really a fair comparison, there.
As for North America, Thomson are launching CUN and SFB this summer.