LTNman
It's easy to overstate the SEN 'problems' as the CAA stats show that in 2014 there were 12 inbound ATMs diverted from SEN, not all of which would be easyJet flights. Not really "operational difficulties on a too regular basis ...." I would suggest.
Equally, late arrivals do not "often get diverted" because nowadays Cat 6 fire cover is available H24 on 30 minutes notice and, as you know, SEN is promulgated H24 in all other respects.
SEN does have its limitations but they need to be kept in proportion I feel.