Does the raglan sleeve contribute to the neckline? (It looks from the picture that it does.) Have you any way to measure either from the "shoulder to the bust" or from the waistline up to the bust so that you can confirm that the "bust-line" you've created will more or less land where you want it? It's just that to me it looks as if the dart coming in from the side seam is lower towards your waist than you might need it.
As you say though, the mock-up will identify problems if there are any!
Here's the fabric choice for Top 64.
I don't know if I'll use the cream coloured silk for the facing or if I can piece together enough of the green cotton print. All I know is that this grey wool next to the neck will not be comfortable. I should read the instructions before making my choice for the facing.
I need to cut off a square and wash it to see if it shrinks. I suspect the fabric is a wool-blend. I'm planning on handwashing this top, but even handwashing can shrink wool. Trying to decide the best way to prepare this fabric.
Granted I feel the cold and dampness of "Wet Coast" winters, so I would vote for a facing that was warm and fuzzy like a brushed cotton considering the main fabric of wool should be warm.
If this top ends up fitting you well, the pattern would be a candidate for the idea of a "reversable top" - instead of a facing, it could be made fully lined where either the lining side or the other side could be worn facing the world. This would allow two shirts for the drawer space of one and be warmer as well. (But I'm getting ahead of things!)