They are definitely upgrading the team - and if they can come away with Nick Bosa ... That said, this spending spree (Mosely in particular wtf) is going to land them in salary jail about the same time as Darnold demands an extension.
You are both right though - the post Martin era is ... not good. That said, Bell is the kind of back who, if he is what he was in Pitt, will help Darnold really elevate his game.
But didn't Curtis Martin start his career with the Jets? I could be wrong and too lazy to look it up. Edit - I got ambitious. Completely forgot or maybe never even knew he started his career in New England. He's definitely an exception!