I do appreciate the misaligned days aren’t ideal, but BACF have done a better job at SOU than previous attempts.
For IBZ, yes the outbounds are Sat/Sun and inbounds Sat(x2), but that still allows a nice Sat-Sat holiday. You could argue the Sunday flight is an extra bonus.
The route where I see the biggest issue is JMK. Passengers will have to do 6 or 13 nights which isn’t ideal. I don’t envisage this route will do particularly well.