Uk operators do not accept left seat dash time, so you will only move as an FO not DEC. Believe that will be the case soon in Turkey where some escapers went previously.
As a job not bad and sometimes any job is better than none, however new joins should have a clear idea of what career path they wish to follow. The value of a regional operator used to be you were based where your family were and you were home each night. I am led to believe that that may not be the case any more at Flybe