As for the voices, I would still take Caroll's over Vogel. I don't think Vogel is right for Big Bird anymore. Caroll needs a new understudy. Vogel's BB is too deep and nasally to the point that it's essentially an entirely different character. Even Vogel has acknowledged the fact that the two sound very different and has stated that his Big Bird is not Caroll's Big Bird. When Matt Vogel was younger he could do the voice, but now it just sounds too rubbery, deep, nasally and cartoonish (if that makes sense.)
I think Jacobsen does a good Oscar, but I'm sorry, I don't buy Vogel as Big Bird. It doesn't feel like the character should feel. Feels more like Barney and less like a 6 year old.
Perhaps Noel Macneal or Peter Linz? (who have both performed Big Bird when Spinney and Vogel were not available.)