The main part of the jacket is all knit in one piece in a 2x2 rib then you add the lace edge on. There's a lot of putting stitches on holders and picking up stitches from the edges, it also starts off with a "provisional cast-on" that you then remove to expose the live stitches where you'll attach the lace.
The first time I read through the pattern I thought it would be the most difficult pattern I've done so far... but now I'd say its about as hard as some of the more difficult ones I've done.
Given the below scale, I'd probably rate this a 7 by just reading the pattern, once I get going I may lower the rating... but I've gotta finish another project before I can start this one.
10 was -- I have no idea how to knit this
4 increase / decrease
3 rib stitch
2 stockinette stitch
1 garter stitch
Hope that helps! I'm really excited to start this one.