Assigned seating, Much more comfortable seating, and even little things like at DUB, a much shorter walk to immigration. Just something about EI that feels better.

Quite right. The non-assigned seating with FR & EZY really annoys me & the seating & cabin environment was far better with EI than FR when I travelled on both in February.
Keeping on thread, Aer Arran, when I travelled with them, seemed a very functional & professional low-cost airline (and they assign seats 🙂 ) and I wish them every success.