Idea as to when it might be available? Difficult question, between 3 and 6 months would be my best guess, but that depends on what happens in the mean time.
Personally speaking, if I needed a crucial feature and could do it myself, I would almost always choose to do it myself, even if it took much longer.
That said, this evening I've been thinking about Brian's post here (third post down) and I think I'm going to adopt a similar way of working.:
https://www.jamroom.net/the-jamroom-network/forum/announcements/5017/new-profile-daily-limits-free-module
So if you are interested in sponsoring development in this direction (filtering and sorting across category pages is what I think you are specifically interested in), let me know.
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¯\_(ツ)_/¯ Education, learning resources, TEL, AR/VR/MR, CC licensed content, panoramas, interactive narrative, sectional modules (like jrDocs), lunch at Uni of Bristol. Get in touch if you share my current interests or can suggest better :)