Man I get depressed whenever I see threads like this. Because I doubt any drastic changes and features will be added on. I am especially unconvinced after reading the 1.5 letter from CDPR. Sure, the new features that came with 1.5 broke that ice a little bit, but those felt more like accessory gifts on top of the urgent need to release free next-gen update they've been advertising so much about pre-launch.
The letter insinuates technical support of the game like quashing bugs, than major feature updates post 1.5. Even if they gain some kind of momentum to release a new paid DLC, it will be story expansions.
While I do look forward to expanded story, especially now, I highly doubt they'll have anything new and big deal features added in as well.
I sound pessimistic, but at this point this is as pragmatic as I can get.