Agree broody MWs in the NHS are stretched and really they are there to risk assess pregnant women to ensure that serious conditions are treated promptly to minimise risks to baby and mum. They probably come into their own if something goes seriously wrong for you. That's why they should be doing basic checks (BP, urine, heartbeat) at every appointment.
For the rest of us, they haven't got much time to indulge our anxieties and needs....although I'm sure most MWs would be happy to answer any questions/ concerns you have. It is really up to us to prepare and find out information for the birth. Buy a book, read Mumsnet, attend antenatal classes, speak to other mums as your first ports of call, then ask MW any service-specific questions you have. MWs will obviously provide personalised care for the actual birth though.
If you want a more personalised antenatal service there are options - you could book into a private maternity clinic etc, but obviously these cost £££!