It is a fair point - according to Jethros fleet lists, Emerald look to have taken 11 ATR72s and Loganair have taken 5 ATRs this year, many of which have come through the same Exeter MRO that Flybe's Q400s have been into. Most of those Emerald and Loganair aircraft have been in storage for a couple of years too and NAC is one of the leasing companies involved all round. The problem is either very specific to the Q400 or specific to Flybe.
The new schedule has them thinly spread across a lot of markets. easyJet, Emerald, Loganair and the likes must be laughing.