I do wonder if the logic for ANR was based on industry expectation that WX would fold, which as yet has not occurred. Without that happening I cannot see that the route has a future and even if it did would enough pax migrate to SEN? WX can offer day returns from both ends and greater frequency. BE only has day returns from ANR, and my (limited experience) yesterday revealed most of the pax on both evening departures from ANR last night (WX and BE) were British.
I also think part of the problem is lack of awareness of the joys of Antwerp - a great place to visit but I heard very few English voices while walking around.
As for the other routes, I can comment on Groningen flight on Monday which went shortly before mine - around 40 travelled which isn't bad but all seemed to be leisure so possibly yield could be an issue. I would say all were Dutch.
I saw the evening Rennes had 54 booked which sounds pretty good