I was about to say the same. NCL-ORK has been performing very well over the winter with very little lead in time by FR and the fares haven't been the lowest of the low so I think there's definitely a market there. Jet2 seemed happy with it and Stobart gave it a go as well. It's a shame FR is replacing NCL-ORK with NCL-SNN and not operating them side by side.
I can see a market for NCL-DUB/ORK/SNN alongside eachother, I hope someone jumps in on it. 4/5 Emerald flights or a resumption of 2/3 weekly FR would be a lovely addition.
SOU as well, definitely. A very popular alternative to LGW for the home counties and not short of a bob or two so no issues with EI fares.