In the time I've been here, I've used the services of all three airlines who have flown BRS-BFS/BHD. Flybe have never been cheap despite claiming to be 'lo cost'. I don't see that changing when they return to the route.
Cheapest flights (approx) I've had - Flybe £50, Easyjet £39, RYR £7 (although more usually £18-28)RTN. For convenience, the City is better for me, but I won't pay through the nose to fly into it just because the route exists. There may be an argument that RYR created demand partially because of their pricing, but the fact is that they did well due to being cheaper, on the whole, than Easyjet. If that rings true, then it is natural to assume that many will migrate to Easy as they are again generally cheaper than Flybe. I hope they are, can't abide that pigsty Aldergrove.