I'm actually happy with the way coil was designed. I'm a filthy casual now too after I quit my static due to a work time schedule after doing the first two bosses in SCOB. I've helped my casual FC get through T5 and primal extremes through 2.3 and we are working on second coil now. We have a decent network of extended friends that we make our own groups use PF etc but we by no means have a static nor do we spend 3 nights a week in coil. We will see all of coil even as casuals we just will be a main patch behind or so... I'm good with that

What it has taken is me and another FC member being proactive about getting groups together and leading these runs. We've made lots of friends along the way using PF too. Go from the seeking learning party mentality to the starting a learning party mentality and use that to grow your set of friends who are your go tos when setting up coil and ex primal runs.