Thinking this all through and based on my experience (scratch built 2 small boats; repaired lots of things boat related; used epoxy in many more applications non boat related)...
I think high temps are fine for epoxy as long as the material isn't getting hotter while the epoxy is setting. But until yesterday I didn't realize how important that last part is.
I only used quick cure once for void filling and never will again; I think that is problematic because of the temperature issue. I also had the "glob" problem with quick set. I was using Raka, but I don't think brand choice is all that relevant (that's a tweaky thing and the problems with quick set and void filling won't get fixed by tweaking). I think the "foam" is outgassing at a high rate.
Most of the time, thickened epoxy should still be runny. Obviously there are exceptions when you have to fill holes that would let it run out. But if you thicken it so much it will hold a shape, then if a bubble gets in there it will hold that shape.
Oh, BTW, I have some pieces of fiberglass rod salvaged from an old tent. If I have to fill a hole larger than the rod's diameter, I cut a little piece and epoxy it into the hole with the end below the surface.
Keep in mind that I didn't make the "expert's list"
so my opinion may be subject to correction. But I would argue the point about not using quick cure for void filling very adamantly.