I haven’t used the All tab in forever because I got tired of blocking meme communities, hopefully I will be able to use it again with this filter, although I would prefer it it was something like the Top filter instead of the Hot one so I could see Top things from each community with the time filters available for hours, days, months.
It would also combine well with user defined multi communities, as we could all happily cast our multi communities as widely or narrowly as we want without much worry about smaller communities getting drowned out.