You have to remember that MAN, GLA etc are only 2 months old. Routes take 1-3 years to mature and establish, and I am told that forward bookings are improving.
The AT46 has almost the same operating economics as the AT76 so there is actually not that much advantage in operating the smaller aircraft apart from driving up seat costs.
I have always said I think MAN will mature, it will be a slow burn but it is a useful route and when it gets into the public consciousness it could tick over quite nicely.
Launching routes in winter is always harder than the summer as demand is generally lower, and January is of course a very poor month, but as we look to the spring i imagine the loads will improve and the routes will do well.
GLA does double daily in the summer season and that could help its fortunes somewhat.
As for EJETs in Ireland, who knows, anything is possible I guess.