Thank you to folks who gave additional insight into Solo Queue. From a personal perspective, I've always been hesitant to remove features once they are introduced - yes, it happens in every game but I'm likely the one in meetings with counterpoints to removal, preferring to first explore how something can be modified to make it feasible. Only after reasonable options have been exhausted am I ok moving towards a removal decision. Again, this is just my own philosophy!
@trgluestickz made a comment that has really stuck with me and I'm mulling over:
"Solo que is currently the only active PVP type right now and puts 2 different groups of players with incompatible interests in the same que as each other."
And that gets to the crux of one of the biggest issues (for me) - incompatible interests among the different existing PvP, potential PvP players, and PvE players.