Lovejet - Whilst I agree with what you are saying about domestic flights from BOH, you will find that all major UK airports have long lists of airlines that pulled out their operations (my local, BHX is no exception - AZ, OK, AI, AA, BA and thats just in the last few years!).
And I really don't think that an airport like BOH is doing too badly when it can boast the two biggest lo-co airlines in the UK and an airline that regularly wins awards for its exceptional customer service as three out of its four recent 'successes'