The BFS route is a simple route replacement - so easyJet can operate in current restraints. Maybe a winter Geneva for the laugh.
However if we were to get more from easyJet then I am kinda with lba4ever in terms of the terminal will need to be built to facilitate the growth from easyJet. I think that's what he is alluding to. Anymore then maybe an AMS, BFS and GVA (seasonal) route and easyJet maybe waiting.
BFS with easyJet should, lets hope, continue to become a decent route and as you've said become 2 if not 3 daily. After all, now there is no Flybe, easyJet dominate the UK-BFS market like Ryanair dominate the UK-DUB market.