It's not an audible, it's a package play. If you read the will and he stays you hand off, if not you roll right. If the corner breaks off coverage you just toss it up.
The only issue is if you know.. they blitz or something and get to the QB before a pass can get out, or hit you when you throw. It's certainly not defense proof, as your o-line is run blocking on a possible pass play. Protection issues can happen easily there.