The situation is what it is, unfortunately. Unlikely that a good option will become available via trade, they are going to have to bring in some bodies to compete with EJ in camp. The list is not pretty, but there are some game managers who in the right scheme (with a dominant defense) can win us games. The hope right now is that EJ can be the guy.
The second and third tier QB's in the draft are not guys who will likely be able to step in and start immediately. Although I think they should draft a guy like Grayson, Petty, or Mannion depending where they fall. Out of those guys I like Grayson the most. I think Petty will get drafted too early. Entering camp I expect to see something like this.
Manuel
Moore/Locker/Hoyer (in no particular order)
Grayson/Petty/Mannion
Rookie UDFA
Bring is some more bulls on the offensive line, and run the football down our opponent's throats.