"Currently you would probably want to use "Divide larger than" to force some additional divisions in larger slightly curved objects like you show there - that's probably a bit easier than using a tight angle + "Avoid smaller than" which it sounds like you are doing now."

I'm not a fan of "divide larger than" since it divide not only in curved directions. So I get much to much polygons - see screenshot. If it would work perfect, it would devide in the curved direction only. This you could implement without to change any UI. ;)