Burda 7576 - Jacket, muslin

I've encountered a problem with the dress.  It's now on hold until more material arrives in the post!  I seem to have miss-calculated a pattern alteration and cut the skirt front piece too small, disaster!  However, crisis was averted as luckily the fabric store had some left - 75cm left to be precise, but I only need 64cms luckily!

And so I've moved onto my next project in the meantime - the suit jacket to match the skirt previously made.  I'm using a Burda pattern for the first time - Burda 7576:

I want this to be a proper tailored jacket, and so am using a book to help me - Tailoring, a step by step guide to creating beautiful customised garments.  I'm going to use their machine method which combines many of the hand tailoring techniques with the sewing machine to make it faster.

Today I made the muslin.  Following the book, I cut the front, side, back, under collar and sleeve pieces only and constructed it.  I'm pretty happy so far; sizing is good (for once), darts and waist line in right place and lapel seems to sit well. 

I need to make 2 adjustments only - first is to mark on the under collar roll line (Burda seem to have omitted this from the pattern) and secondly, eliminate the back peplum gathering and replace it with a pleat, which I think looks less homemade, what do you think?