Beautiful pattern and excellent video class. I learned so much about cardigan knitting from construction to finishing. Gudrun is a great designer and teacher. Not sure why this class and pattern is not more popular than it is currently!

Mods:
Continued lace pattern for a few more rows in the front

Added 4 short rows (2 turns) on row 14 (left front) and 15(right front) after joining front and back.

sleeve. Pick up two more st underarm. Dec 2 st at
8x1
12x1
14x8
12x1
8 rows before ribbing of 18 rows. Bind off.

Waist shaping: skipped the first decrease under bust. Then from the row where the pattern stated the 2nd decrease, did 6 sections of dec every 8 rows. Then 6 sections of inc every 8 rows. Stockinette for 5 rows then ribbing 12 rows.

Button band. Pick up 125 stitches.
Collar. Added one more increase round with more increases at the front and less in the back. No decrease on purl rows. I like the shape better than the original design.