Great to see EZY starting flights from SOU, as others have said it will be interesting to see if Geneva is just the start of the Orange... Nonetheless, it is a welcome addition for the Ski season, especially as Flybe have cut flights and capacity in recent years.
I believe the A320's EZY have are in fact better performance wise than most of their A319's, as many of the latter have a restricted MTOW and de-rated engines to lower operating costs, not to mention EZY weren't flying many longer routes when they first got them. Guess it is also worth pointing out that they only use the A320 on the longer Canaries routes from SEN.