My hunch is that the Air Moldova move from LGW is slot related. Their current service at LGW is a late evening affair and the STN times are far more sociable!
As the route continues onto DUB from end of the month I don't see a major changes. Expect that there is some sort of discount operating from DUB late at night. Blue Air, Air Baltic and S7 all have late flights from DUB so there has to be some sort of positive reasons for the poor timing for passengers.