May be a silly question, but why would you need to do a JOC in order to fly a turbo prop?
EK, the simple answer is that you don't. You don't even
need to do a JOC to fly a 'jet'. Think of it as yet another revenue stream.
Flybe have, in the past, employed many many freshly qual'd CPL/IR bods straight out of flying school. I know some who only had a total time of about 150 hours - and they went straight on to the 146 before the Dash with no problems.
The name JOC is also a bit of a misnomer as there was a training academy that used to do a 'JOC' on a Kingair sim. The course is only an introduction to the way you operate an airliner with two crew, checklists and SOPs etc..
If you can fly a Duchess or a 172 then you can fly a Q400, it's very benign albeit with more complicated systems.
As far as recruitment goes Flybe will only take on the bare minimum of newbies, from any background. Whether that is to cover any potential expansion or because Frenchy may have had a whiff of many unhappy pilots who are planning to go elsewhere who knows!