The 319s suite most of Easy's way of operating. Unlike Ryanair for all but the longest routes Easy tend to offer three or more rotations a day, thus meeting the demnds of business travellers those who may want to connect etc. It doesn't take much expansion to turn 2 A321 sectors into 4 319 sectors and pick up more pax due to flexibility offered. If it doesn't work drop to 3 319s.
So expect a few 321s only to be kept for the likes of IST, ATH, TFS etc where there is little to be gained from multiple flights/day -they may not even keep them for these in the hard times to come.
As others have said no place for 320s or for tha matter 737NGs
Can ayone come up with seat/mile costs for the 321 vs the 319 on the sectors I have mentioned; unless the 321 shows an advantage then even less chance of keeping them.