So, the factorio team plans to get rid of filter inserters entirely in 2.0(Aug.-Oct. 2024). They plan to make all inserters capable of filtering. Recipes are gonna have to be revised. I also have a suggestion for improving the UPS. Convert the current non-filtered miniloader into a loader prototype instead of inserter. Rename it to standard or basic miniloader and have it default to blacklist with blank filters. If I need to stop a dumb loader from working I can just apply the needed logic to the closest belt instead. Then you rename the filtered miniloaders to something like: smart miniloader and otherwise just keep it pretty much the same as it is already. Again, reminding ya' gonna need to remove filtered (stack) inserters from the recipes. Maybe add some extra circuits to the recipes to make the dumb loaders smart?