Ever since I updated to 69 I've been absolutely loving it. The most noticeable improvement is it feeling incredibly faster, but as someone who's been using 4-5 profiles on Chrome for over a year the new user management stuff just feels so much more intuitive/integrated.
I was super surprised to see people complaining about it on HN this morning, and I'm still not entirely sure what the problem is. FWIW, I also severely disagree with a lot of the implementations of GDPR, so maybe I'm just not the audience who cares here. To me, this update has been nothing but improvements so far.