Somehow I'm not getting much improvement in speed with 57, it's been a bad transition technically for me too, aside from the privacy/marketing - lost addons (expected, but still), broken fonts, bookmarks not working, one users profile completely broken (other ones on same computer are fine), slow page load, lots of freezes, ... reversing the changes to the newtabpage and such.

Worst update in ages for me, only one as bad was one of the teens (19.0?) which needed new profiles making. I've only been using it since v0.6 or so though ^_^