These would seem to be on the E195 rather than ATRs given the block times. The surprise for me is that DUB originates in SEN - I thought the route really picked up before when it switched to starting in DUB. The early departure from SEN and later departure from DUB also make connections less attractive.
MAN the jury is out - the early departure clearly says they are after a local catchment primarily heading north for business. There is certainly a market for that, my reservation is whether it comes anywhere close to filling a 100 seater.
I also hope these aircraft are in addition to the two existing ones, rather than replacing the European city routes that have much more potential.