I mean it makes sense. Before people would have to sit in lfg for hours, in order to find people to play with, but that’s too boring, now they check flist and if there is no1 there to play with, they will just shuffle it up 9/10 times. If you don’t already have people on your flist to play with, you are screwed.
A simple fix would be for Blizzard to allow people to advertise in lfg, while queueing shuffle/bgs/dungeons/etc.