Alright that's reassuring, was a little worried something might be broken. My winter cover is a fairly small hole mesh (not sure brand) and we did dump a bunch of pine needs accidentally while removing it. I'll keep at it, I can still see a lot but it's probably picking up more than I'm seeing as well. The rough filter is always fairly coated in decomposed stuff/sand so it may be pushing more around towards end of cycle.
I hose out both rough and fine filters and bottom of basket after every cycle. I also hose entire robot down inside and out before I bring it in for the night. Only place I haven't checked is the impeller, maybe i'll take that cover off and check there too. End of cycle there are some large leaves usually caught in the felt/cloth at bottom of basket but not sure they're completely stopping stuff. I have noticed some stuff trying to "escape" out the edges between plastic panels, mostly small stuff so it maybe be smaller than gaps around filters. Think that might be hurting it's ability to pick stuff up?
Attached some pictures for reference. Apparently never took a before picture right after opening. The second picture looks far more green than it did in person (but I do/did have an algae problem)