I've only watched "Evolution" so far, and WOW did it look good. The colors are vibrant as hell and the bolder lighting style really pops off the screen (especially compared to how flat and lifeless everything looked in the second season).
The new, light gray carpeting on the bridge really jumped out at me as well. I never realized it was that bright
Unfortunately the episode itself is still a bit of a snoozer. Once you get past the amazing effects, it's basically another "stuff goes haywire on the Enterprise" story (which is a plot device they used way
too often on this show), together with another tedious "Wesley learns a valuable lesson" story.