We've got multiple LE certs that haven't expired by 30 days (right now we have one that expires on 7th Feb that hasn't renewed yet).
Being able to adjust, or set a default then adjust after would be the best, as we have regular annual certs that we want notification at say, 30 days, and then LE, which we don't need to know about until a max of 14 days before renewal (plenty of time to do something if needed, maybe even less) as we're just getting a bunch of excess notifications that we're not doing anything with.
6 days is just stupid, aka, they want them all and stuff regular certs. Yes it should be automated, but there are many systems where it simply isn't an option…