It's true that there was a blog post about this, but in my opinion that post didn't really call out the departure from the green color in favor of the new blue/purple in particular. They showed some screens, but those show blue/purple and green highlights in fairly equal amounts … in actual use, though, so far, I feel that's inaccurate. For as long as I can remember, Evernote's personality in the UI had been white and shades of gray, and nearly all highlight color was green. Now in use, the highlight color is almost all the blue/purple; buttons, hyperlinks, checkboxes, note links. Combine that with the typeface changes, which I find very subjective (they claim better readability, I think that's negligible and not worth the interruption). I do appreciate some of the structural/architechtural changes that must have been a ton of work and have added speed and stability to syncing. But these aesthetic changes in my opinion are not improvements but instead are interruptions to a user base that as far as I know were not complaining or having problems with the visual UI.