Jet2 have 7 aircraft. easyJet have 3 aircraft so it makes perfect sense to have more desks for Jet2.
I always use the lift to get to my work & can see the easyJet desks from the coffee shop. It's never more than 10 deep so the fact that you waited an hour is atypical. I used to commute weekly & never stood in a long queue. The LS queue does snake but without the snake it would be well out of the door at times. Let's not pretend that LS never have any queues because that's utter nonsense.
Thomas Cook, Ryanair & Thomson long haul all generate long queues. I'd hardly say LS were premium to anyone. All airlines offer a fairly generic service.