TL;DR
Title above, but just in case: the filters on inserters should have a "priority list" OR Provide a way to prioritize filters.What?
The filter slots should be a priority list - or please provide another means to prioritize filtered items (without a chain of combinators).Why?
Prioritizing spoilage exists. This was necessary for obvious reasons. But the filter slots, of which we have five, don't provide any means to say: "If this item exists, pick it up first."If I'm burning nuclear/rocket fuel OR solid fuel OR coal OR carbon I *may* wish to prioritize one over the other. Yes, this is able to be done via combinators, but not every location has unlimited space to use multiple combinators.
A toggle or simply having it on by default if "whitelist" is selected (and off if blacklist is) would resolve this issue. 'sides, if an inserter is smart enough to determine how close an arbitrary item is to "spoiled" then it should be smart enough to do this, right?
I know this is similar to the thread: 113399 but I'm not asking about circuits (because this is already possible).
Post-Script: If more information is requested I'll happily provide it, but I feel the idea is simple enough that the above fully describes it?