Hi Aquarius, I changed MW for my 1st one, I did not click with her so I xfered to a MW at the hospital I worked at & I knew she may not be the one delivering baby but was happy to have the care from someone I knew well.
I think at the end of the day you have to have a MW you are comfortable with & you are receiving the care you need.
As this is your 3rd one you will know from history what kind of care you need & if that includes high risk you will be keep a very close eye on.
The lady who complained felt like she needed to and probably had a good reason in her eyes to. If the MW is not being investigated for something serious that can affect the care you get then I would stay with her if I was happy about it, but I would make sure I got the tests & results I needed & I would be involved in it all.
So good luck & relax