Robin at least had some moments to shine: overwhelming Cabbage being the most memorable. Otherwise she spent the arc running around the island intervening during key points. But between the CP0 stuff and Robin constantly saving people, she gave off the aura of someone with giant potential.
All Chopper's done is capture Brulee, which I count as equilavent to Robin trying to take out Sugar. But otherwise he's come off as someone horribly outside of his element and not particularly useful. So something's gotta happen for the little guy, even if Oda's just building him up for the next arc.
Like I said, the Robin equivalent. Her capturing Cabbage was cute, but eh, not that big of a deal, especially since he's supposed to be on their side, meaning he was currently being a nuisance.
As for her saving people, I mean, Chopper and Carrot together took advantage of Brulee's DF after capturing, giving them a massive advantage in terms of obtaining a place where they could all group up safely and figure out what they were going to do. Additionally, he saved Pedro's life, or at least saved him from getting a big injury.
So yea, they're more or less equal to me tbh, although now that I've laid it all out, Chopper was actually pretty damn useful even though it doesn't really feel that way.
