Warner leaving puts a lot of questions on this team. Our defense clearly needs to be rebuilt and a Leinart run Cardinals can still be a great offense, but it won't be as explosive as a Warner led offense. It is unfair to Leinart to expect him to step into a pro-bowlers shoes and match his recent performances.
We have a lot to address this year, I don't think we can afford the change at QB.
_IF_ Warner leaves, you keep Leinart for his 2 years remaining with the idea you're drafting a QB after this year or resigning Leinart before the draft next year.
_IF_ Warner stays, you have to let Leinart go to avoid the bonus money he's due (as we cannot afford to have 2 big bonus QBs) and draft a potential replacement QB this year.