The problem (and feature) of JoinMarket lies in takers covering the costs of inputs and outputs for their makers.  When selecting an entity to mix coins with, I'm essentially covering the expenses for their inputs and outputs.  This quickly renders it unappealing in the present context, where we pay more than 15 sat/vB. 

What's required is a network with no distinctions between makers and takers, that consists solely of users leveraging the network to create a shared space, because the main problem with coinjoins is being online at the same time with the other joiners.  Once a collective of participants is created, they could merge their inputs, generate blinded outputs, and cover only their respective portions of the costs.  I believe this network is feasible to create.