What part of specials in season folders dont you like?..is the problem with it per se or the way it currently works given the current metadata and ui design.
For me (and the way i see/use the collection) there are a couple of types of special episodes are far as tvdb classifies them (in the specials category)...
type a - specials which are part of the flow of the story eg a christmas special (and might as well not be in the specials at all)
type b - ancillary content pertaining to the show eg. behind the scenes, bloopers or whatever..
type c - specials in series which dont have an ongoing narrative and the special status is more a broadcasting/commisioning quirk than anything else..the special is of equal status to season content eg. documentary eg. horizon.
type a should have airs before/after metadata to ensure they exist properly in next up, it makes sense that they might appear in the seasons themselves..
type b - are orphaned content that would never appear in season uis or next up..
type c - should certainly appear in next up, and maybe also in the season (metadata supporting) - they are similar in use to type a (and perhaps the same)
perhaps you have others...?
is there a workable (per haps automated) way to handle all the different types, so the default matchs 80% of peoples expectations and custom flags handle 20%?
why would people not want specials (especially type a,c) to show in seasons?