After nine holes today I have to say that I'm really thinking about adding the 14° to the bag for the MC. I think my ball flight is high enough with the 15.5° that I can use the 14° effectively. I've never felt really comfortable with a fairway wood under 17° before putting this in the bag, so that's pretty cool.
Couple highlights from today.
3rd shot on the first hole - Par 5 585 yards. I had to punch out due to a pushed drive. Cranked it straight and long and left myself with a 90 yard wedge.
Tee shot on the 5th hole - Par 4 291 yards. The hole is sort of deceiving to the eyes. I wasn't really sure what to do, but knew I just wanted to hit it straight to keep it in play, so I hit the Mashie and was left with 75 yards to a back pin.
I only took two other shots with it and they were both basically topped balls that couldn't have been saved by anything.
Sounds like you were hitting the Mashie pretty well. If you have no issues getting the ball in the air then you'd probably like the 14* too.