It is a mystery how BHX and MAN have been so messed around with.
Back in the day when it was a BA (Cityflyer?) service to MAN, there were three flights a day. True, they weren't the cheapest, but it meant people had a choice of when they would fly.
What BHX and MAN need is a simple 2 flights a day schedule, with one of the flights (probably the morning) operated by a prop. It would have the capacity about right and still give people the day return option.
In general some of the EI flight timings baffle me.
Seeing flights depart to Malaga and Faro (leisure destinations) on a Monday morning (prime business traveller time) and then having lunchtime services to Manchester and Birmingham (business destinations) at lunchtime (a time which doesn't suit business travellers, but is neutral for leisure passengers) makes no sense