Hywel Dda University Health Board is at the mid-point in its consultation on the plan, which ends on August 31.
So far it has heard concerns about transport, stroke services and worries about the closure of a hospital, among other things.
More than 1,600 people have so far taken part in the consultation by attending events and more than 1,500 people have completed the questionnaire.
Participants have included patients and staff, individuals from seldom-heard groups, veterans, and elected representatives.
Medical director Mark Henwood said: “Members of our community recognise that our services are stretched, and have taken the time to share personal experiences, which provides valuable insights for us. As staff, patients, and local service users, we all want to improve our services to meet our current and future needs.”
Mr Henwood said: “Transport and how patients could access services has been raised as a concern, reflecting how our services are spread out over a large area.
“We have heard concerns about the options being considered for stroke services, particularly the ‘treat and transfer’ model.
With specific concerns about transport and being able to visit loved ones should they be transferred to access rehabilitation services in another hospital.
We want to reassure people that under all options, the initial diagnosis, and where needed, potentially life-saving thrombolysis treatment, would continue to be provided at all four acute hospitals in the Hywel Dda area, including Bronglais Hospital.”
“We’ve also received questions about the future of Llandovery Hospital. There are no plans to close Llandovery Hospital, which is a hub for our community and provides a range of services from the ward and palliative, end-of-life care, to services offered through clinics.”
The health board wants to hear from the public on nine healthcare services in a bid to improve access and standards and deal with current challenges.
These include critical care, dermatology, emergency general surgery, endoscopy, ophthalmology, elective orthopaedics, radiology, stroke and urology.
Proposals could change the way these services are provided in hospitals and some community facilities across Carmarthenshire, Ceredigion and Pembrokeshire in the future.