Green is significantly less frustrating as a fan. His post-game interviews, general communication and in-game line management are a significant improvement on Willie. He also hasn't been trying to make square pegs (Sutter, Megna, Chaput) fit into round holes (top-6 roles with PP time). The deployment of the Sedins, Gaunce and Sutter this year is exactly how they should be played, and never would've happened under Willie.
However, the results speak for themselves. This is a better roster with a worse record. The positives from the stuff above are negated by negatives in other areas. He may be even more veteran-friendly than Willie, which is astonishing. Young players have stagnated, obviously Hutton in particular, but he didn't get another notch of performance out of Baertschi, Granlund, Gaunce, Stecher, Markstrom, etc. Aside from Boeser and Horvat, how many young players have actually developed or progressed this season? 10 minute Jake has had a positive season IMO that Green could get credit for, especially relative to how Willie handled him, but that's about it.
I think in any given season, Green could be between the 15th and 25th best coach in the league - probably not bottom-5 bad, but too many flaws to be better than average. Willie for the Calgary playoff disaster alone was bottom-5. Green's performance this year has him teetering closer to 25 than 15.