It's certainly better, but still not perfect. For me, though, the real test of whether or not it's a 'good' license isn't so much the text itself - it's whether companies produce books I (would) want under the license. Which remains to be seen.
Also, I can't help but consider that if I wanted to kill off 3pp support, but wanted to look like I was fully committed to it, then I would do exactly what WotC has done - make big promises, then delay, then release a useless first version, then delay, more promises, delay delay delay, and then finally release a useable version once most people have moved on.
Then again, WotC didn't have to offer anything at all to enable 3pp support, so they've still done much more than they needed to.