I would start weaving. The thing that I worry about is that some idiot cyclist would cause speed restrictions on a MUP because of their carelessness, and then everyone loses.
There is no way I would pass the two pedestrians at the same time. I pass all pedestrians at a walking pace if they are going the same direction I am. One of my main complaints against motorists is that they refuse to slow down, why should I do the same in a situation that might prove dangerous to someone else? Maybe we have lower pedestrian traffic than other places. I'm not sure I would ride on a mup with heavy pedestrian traffic