Improved guideline support makes it possible to lock guidelines. That’s useful. Create guidelines (g) from a single selected nodes creates orthogonal guides at that point, which may also prove useful.
I like the new option to calculate Unicode Ranges and Code Pages. That saves a lot of time and eliminates errors. I tested it on all of my unicode fonts and uncovered a problem in two of them. Calculate code pages doesn’t find any code pages supported by the bold and bold italic typestyles of Unicode Garland
I haven’t tried the import image feature yet.