Ok, I took the plunge and upgraded to 4.1.4 as well.
Overall it went ok, although the fact that you can't use firebug to get the CSS styling for the new editor BLOWS.
Although really, what blows even more is that they released this, with zero support for their style var system. I've been having a hell of a time figuring out what to change for the editor colors. I have a very dark theme on my site and it looks like crap the way it is.