There are a lot of really common job types "missing" from the village, aren't there?
Where's the blooming hairdresser for a start? That's a great job for not-specially academic school leavers with some good business acumen and a flair for working with people. Also easy to be self-employed after training, fitting in with the academic pattern.
What about a teacher? Loads of mates from (rural) home have become teachers, either straightaway or later in life in order to come back to the area.
Nursing/midwifery - likewise, so it seems particularly odd that Amy's left to do it. Not like there aren't enough sick/old people or babies happening.
What about exercise/dance/fitness type professions?
Ok - so what do we have in mind for Feebs? Personally I'd like her to become a doctor as she's so clear-headed and no nonsense. Come back and kick out useless out Locke.
Also, Alan is a bit pointless at the moment so how about getting in a lady vicar and upsetting the old fascist brigade in Ambridge again?