This is knee jerk. The jury is still way out on Lance. Did you really expect him to come in mid season and take the world by storm?
Certainly no guarantees, but at a minimum there is plenty of reason to think he could become a high quality #2, and the traits that had scouts thinking he could be a quality #1 haven't vanished. Time will tell, but an injury prone rookie season and sitting behind an established starter his second year isn't giving him that time. Success doesn't come from quitting when things don't go ideally from the beginning