I think I know what you are asking and that you are just curious about generalities in a line, but honestly, each horse is an idividual. This mare has a dam too, not just a sire lol. Is Mizzen Mast the sire, or grans sire or dam sire? I think the dam has as much to say as the sire does (sometimes more depending upon the dams prepotency. Also, nature vs. nurture, how the mare was raised, trained and cared for will also play a big part in expectations. Her conformation is key as are any old injuries etc…
I am always curious whether, if someone responded that Mizzen Masts have bad feet and are Koo-Koo that would cause a poster to pass. That would be a shame.
That said, I do understand that some lines seem to pass on certain traits, so I do “get” your question, but it just sounded a bit specific when so much depends on factors other than the sire.
I have known one Mizzen Mast filly and she was a 2 year old in training. Nice filly, fairly unremarkable as far as her temperament was fine and she fit right in with all of the other babies (which is a good thing). She was a pretty filly and her neck was tied in rather low (by low I mean not high and gave her a “huntery-looking” way of going). This filly had good sized feet and they were in good shape. She was an easy keeper for the short time that I knew her - a pleasure to have in the barn.