Beach cover-up neckline dilemma

My extended family is going to the beach in a few weeks, and I decided to make myself a new beach cover-up to replace the usual t-shirt and short combo that I wear to and from the beach. The Built by Wendy Coats and Jackets book that I have has a pattern suggestion for a cover-up – basically a simple dress with raglan sleeves (baseball tee style) and a notched neckline. It also calls for a hood and pockets but I didn’t feel like adding them, and didn’t have enough fabric (from Loulouthi by Anna Maria Horner) anyway. Actually, the pattern also called for a zipper up the front of the cover-up, but since I decided to make it out of a light cotton, I thought a zipper would make it pull and hang funnily. So my current dilemma: the neckline.

The pattern suggestion calls for just a straight vertical slit, edged with bias tape. I really disliked that however – because the edges just stood up straight and looked very awkward. So now I’m trying to figure out what to do with the neck – straight V (sort of the right side above)? Or a modified notch (left side above)? Deeper scoop neck with small notch? Something else entirely?