Those of us Republicans who are displeased about the Romney/Ryan ticket are only displeased about the Romney part of it...
I believe Ryan is better than a lot of others that could have been picked. He still has his weak points. For those who feel Obama must be replaced with anyone, I think the Ryan addition to the ticket makes it much more likely Romney will become the next president.
There are things I really like about Ryan. There are some things that make me groan.