I see the ryanair announcement mentions 25% growth but is rather ambiguous as to what period that relates to. Not sure what s2015 was in terms of weekly departures at its peak, but 250 per week for next summer does sound more than the 15% indicated by the increase in seats.
LAX, you mention destinations still not served from MAN; I wonder if easyjet will come up with anything to plug any of those gaps.