MUPs are not really MUPs, they're walking paths that are impractical for bicycle use for all the reasons depicted in the OP video. Add in people-walking-5-abreast-blocking-entire-width-of-path and numerous dog walkers with mutt on end of 20' flex-leash to complete my experience with MUPs. People will walk when/how they please, pretty much the same way they drive.
It's nice so many people were actually walking on the new path in OP - at least it was getting some use, not a complete waste of public funds.
Joey, I like your music choices, Strauss was perfect. I had not heard "A little less conversation" until a few days ago, and thought I knew most of Elvis' songs. I was surprised to discover I actually had the song but somehow never listened to it.