Wellll… after much debugging. I had to override members->single->blogs.php in my child theme and set the subnav to have a no-ajax
class.
ie. <div class="item-list-tabs no-ajax" id="subnav" role="navigation">
I don’t know if I lose anything with the My Sites page if no-ajax is set.
It would really be much nicer if I could just achieve this in the plugin without messing with the theme. Or have I done something wrong here?