On the general subject of Flybe's 'Connections Timetable', and not just as it benefits SEN or not, it would be interesting to know how much take up there is for those flights. Flybe have had such timetables for some time I believe so they must know how useful it is in terms of additional revenue.
Regarding the SEN connections I suppose ABZ, BHD, EDI and BHD might be the most attractive ones out of the 17 connection destinations currently available. I do agree with previous posters who have suggested that SEN-MAN-SOU-AMS or SEN-MAN-CDG-GVA and some others are rather silly but I suppose the algorithms chose whichever are technically possible. Perhaps it needs human intervention to weed out some of them.