preamble, the fit is awesome, especially the SC.
regarding the collar. i think on you it looks very elegant. its long enough, but not too long. personally, i have a hard a time with collars that do not go under the lapels, but that is more of a personal thing, as its really only problematic when its a spread collar that is too short. this is not a spread collar, its really effectively a point. i do like the button under the collar and how it lifts the tie though.
i wouldnt recommend it for a beginner building their shirting collection, but for someone like you who has the staples covered, i think it makes a great edition. why not get a few?
But it is a tab collar ya big dummy