Simple, Smith is a defenseman who couldn’t crack the top 6 on a bad defensive team this year and probably can’t roster next year. Look, Stall is no bargain either but he is a better defensive option and he played top 6 all year. The coaches clearly see Staal as a better option and if he is used properly (bottom pairing) he can contribute.
Coaches and organization clearly feel like they owe Staal something for all his years of service.
He was our worst defenseman from the new year onwards. He is a liability even on a bottom pair.