The tech may remain sound but what studio would trust them after the stunt they pulled this year? They could change the terms of service at any time and you'd watch your projected revenue go up in smoke when they decide they deserve 10% of your annual revenue.
Long ago CDPR promised full modding toolkit to the community. They released some of that modkit, but not all of it. This will allow the community a full suite of tools to design new quests from the ground up, including posing and scripting and animation, possibly new voice line inclusion, who knows what else. Maybe text entry?
I'm glad they're finally releasing this, as we have all been waiting for it. Maybe they feel their work on TW3 is done, and recognizing their game for its cultural importance, are doing the right thing and letting the community take over for them.