AFAIK, no one is working on either traffic obfuscation or smarter clients. Most Nostr devs are focused on building social media apps -- a focus which is slowly killing the future viability of Nostr.

I would write the code myself, but I'm far too slow at programming; I can't make meaningful progress in my free time. Plenty of ideas, but no ability to implement them. The years I wasted not getting good at programming have finally come home to roost.