I figured I would update here since you all were so helpful! I made the dress and opted for the Mandarin collar, since I love it so on Sunday Brunch and Music Class. I’m a total novice when it comes to drafting modifications, so hodge-podged together a collar that would fit. Only I didn’t think to add height to the placket to make up for the space allowed for with the tie collar. It didn’t come out quite right and the neck line is too low and too wide of a gap between each collar front edge. I’m sure a more experienced sewer would make this work beautifully, but alas, that is not me! I actually don’t love how the fabric drapes anyway, so no big loss.
Thanks, all, for your advice! Love this community!