#1, hands down, keep. They don't skew retro. They skew stylish and a bit unusual to me. Wear them, and expect to be asked over and over "OMG where did you get those?" I would be the first person in the room to do just that!
#2 The color is really beautiful, especially against your skin. If they're super-comfortable and you enjoy them with pants, I'd vote keep for now, and set an intention to wear them at least twice this fall. If you feel like you can't wait to get them off and/or consistently swap them for other shoes, donate 'em.
#3 I'm on the fence about these for two reasons: 1) I have spent pretty much all of 2022 poring over every Ralph Lauren show that is available on the internet, and I see a similar style of sandal pop up every 2-3 years in a spring collection, worn with pants. I think these would be really cute with some flowy pants. and 2) If these sandals go with your dressy events capsule (weddings and fancy gatherings), it's good to already have a pair that fits you well, and not have to scramble when something unexpected pops up on the calendar.
Okay. So basically I just said 'keep all three'. Not only am I of no help, I have become my mother. If you're going to keep one pair, definitely #1.