Deleting is possible but it creates a layout much worse with 6-sided faces. I was hoping someone at McNeel could tweak the code so the singularities would try to align themselves on the same loop when they are at a certain proximity.
I managed to really break a SubD, stumbled on that and it did an okay job. Also SelBadObjects in these cases of singularities does spot it - downside of V7 WIP ditching my settings is that CheckNewObjects wasn’t Yes, so I’m not sure where the singularity has cropped up.
I’m no topology expert (great link too by the way) but I guess something like this would be the solution? I would second the request for something that gives you more intelligence in this kind of case. My First instinct would be you would’ve maybe needed another guide curve, offset inside from the original?