One burning question about the effort to replace Assad.

We've listened to the Administration talk about how Assad must go.  We've watched them backing rebels...many with questionable resumes....with military assistance, but no one is asking the real question.

We have the intel to be able to locate Assad and his remaining generals to within a few feet.  So why haven't we sent a couple of F-15E's from the UK loaded with some of the bunker busters and micro fragment his ass?

Why are we looking for style points when it comes to his removal?  Why must it be accomplished by rebel groups?