In my professional slide days this would fall into three categories--
--oh well you loose some.
--can it be "re-shot"
-- push and pray if it's Newsworthy.
I not only did commercial work for years on transparency film, I worked for a year photographing breaking news on E-6 film of all sorts from 100 speed to 400 and 1600 pushable film that was nasty ugly stuff for high school sports.