Paully's point is well made.
On line check in is no problem for me and I prefer it, but a number of older friends like the 'traditional' means of checking in for their flights. This market segment often fly only rarely and are simply unfamiliar/uneasy with using a computer to print out vital documents.
It will no doubt save EZY a few bob but I suspect there will be a fair number of their current customers who will, at the very least, look to see if more user-friendly (in their view) options exist. Retaining the possibility of airport check in for a reasonable additional charge might have been a better decision perhaps.