Fair tbh. It's a tough call.
I think it depends on how much McDaniel and Grier believe they've succeeded in balancing the offense. More than the run/pass - the space they threaten. If they project a combination of EE, Achane, Barrios, Mostert, Wilson, and the TE's can take advantage of touches underneath and the space created by Hill and Waddle, they're probably willing to be patient and prioritize signing their own like you suggest.
If there's any doubt, signing Taylor should be an instant fix. He also keeps Mostert and Achane fresh and slides them to dangerous change-ups.
So, I can understand either side on this one. I think Taylor, McCaffrey, Henry, and Chubb are the exceptional RB's in the league - the ones who demand extra attention - and Taylor is the youngest and fastest of that group, which makes him a particularly good fit. If they can stay healthy, Hall and Robinson should join that group.