They're still worth doing if you want the Koldane Cartel motif chapters. Until we get a patch or hotfix, then they aren't working as far as the Finger challenge goes. I've mostly been enjoying them, especially on characters who haven't really needed to do much of anything in Glenumbra outside of Illesan Tower or Bad Man's Hallows since they completed the zone years ago. And yes, grinding dailies is preferable to 5K crowns for the motif.