Shamrock 350
Stobart messed this one up I think
I think that is undoubtedly true and the rest of your post accurately portrays the situation regarding SEN-DUB.
What I find staggering is that Stobart threw away a route over which they had complete control which produced a high pax volume for SEN at a time when they seem fixated with passenger numbers at SEN (perhaps quite reasonably) as proof of its success. It also showed that SEN could support a multiple-daily major European route offering interlining to the USA on a national carrier. The value of that when trying to persuade other airlines of SEN's attractiveness must have been considerable.
With BE no longer operating LCY-DUB it seems equally extraordinary that Stobart do not reinstate a route which not so long ago was considered the core route of the Stobart Air SEN operation. Some difficulty in scheduling it within their current fleet capacity can surely be overcome if the will to do so is there, especially when the winter schedule commences.