Where do some of these opinions come from ?
London to Athens not profitable for LCCs ? It was one of Easyjet's earliest routes, and they more recently added a parallel route from Gatwick.
Long routes not profitable for LCCs. Folks, it depends what your yield is. Longer routes with higher fares will be profitable. Shorter routes with lower fares will not be. Not solely dependent on mileage.
Ryanair won't pay airport fees. News to their 2 largest bases, Stansted and Dublin.
25 minute turnrounds are necessary. Well looking at some comparisons, those with the shortest scheduled turnrounds often have slightly longer sector times scheduled on identical routes. It all depends how you present it.