I say no. We need Ryan in Congress where he can make a difference. We lose his ability to change things if he becomes VP. As VP he loses any power to push the Conservative adgenda.
It is not uncommon for people to say this but I have always thought it untrue.
What about Dick Cheney?
Yes, the orders ultimately come from the President but if the VP holds meetings and conducts discussions and negotiations on the President's behalf then he is making a huge contribution.
The President is just one man and the federal government is huge. Having an experienced Congressman as VP participating with GOP Congressional leaders in drafting legislation to reform the tax code and the entitlement programs sounds like a big plus to me.