Flybe
Daza
My view is that it's all about risk. I should imagine Flybe think there is little chance of Baby continuing at EMA and so are effectively staking a claim at some of their 'preferred' routes, which appeal to both business and leisure traffic, with no direct competition (assuming Baby folds). BHX is, of course, entirely different. Baby routes at BHX for which there is no competition (those you mention, excluding GVA) offer greater risk, with the exception perhaps of NOC (and even that has Ryanair at EMA). I can't see Flybe desiring to take on the likes of LIS and BCN which I think would be new destinations for them when there's easier pickings at a nearby airport instead.
I'd have thought that BCN certainly would have been a natural addition to ZB and perhaps LIS too.
As with you, I sincerely hope a buyer for Baby will be found so all of this remains simply talk.
Scott