Now that the update is live, and I'm using it to do my "day-to-day" stuff with my regular teams (one at end of season, one in regular season, one in spring training), I'm liking it more and more than I was when I was testing it in the test worlds (and I had reported a number of bugs there).
To address Mike's concerns about roster moves being more of a pain in the *** . . . they're not. It's pretty much the same number of mouse clicks and page navigation as before. Maybe a check box to check, or a button to click, might be in a slightly different place or have a different name, but that's a trivial thing that you get used to pretty quickly.
I do around 99% of my HBD stuff on a PC. I only use my phone or tablet to look at things (mostly, game results) if I'm out, or to make simple tweaks that need to be made before the next game cycle because I'm not going to be near a PC. The update seems to handle those things in a better way that before.
Maybe it's a different experience for those who manage their teams primarily through a mobile device. But as primarily a PC user, I find the different look to be not a big deal, and the minor functionality enhancements quite useful. Nothing, to me, has been a step in the wrong direction.