I think the concerns about how much and how long you should sign him are going to stay valid. Most of that is just a basic philosophy on where your money should go. He's not 2017 Alvin anymore but he's tough, smart and can still glide. There is plenty of athleticism left for at least a couple more highly productive years (hopefully more).
I think anyone would agree it's great seeing him featured in this zone running scheme. It's what he was always meant to do.