Agreed. The Marlins have said that Segura was signed to play third base, which makes no sense when a) he's never spent any meaningful time playing third base and b) they already have Joey Wendle penciled in as a perfectly cromulent third baseman.They also signed Segura when they didn’t need him. There’s definitely something lining up, even if it’s not with the Sox.
What makes a lot more sense is that they signed Segura to play his best position, second base, which would push their most exciting player, Jazz Chisholm, to his natural position at shortstop, which would make incumbent shortstop and free-agent-to-be Miguel Rojas expendable.
I would predict that signing Segura and Cueto are both moves designed to allow the team to trade an infielder and trade a starter, respectively, to bolster other areas of need.