Several problems with your post.
1. If they sign Jim Schwartz, you guarantee a switch to the 4-3, but they have no depth for the linebackers.
2. If you don't like Pees because he runs a "bend but don't break defense", then why in the world would you want the Tampa 2? That's the exact definition of what the Tampa 2 is. I actually like the idea of the Tampa 2 if the Ravens could get better LB depth because Mosley has the sideline to sideline range needed and Jernigan could be the ideal 3T.
3. Errr, Rex, Marvin, Pagano did not run complex schemes. There schemes were very straight forward. The issue that most people perceive to be an issue with Pees scheme is that it is too complex and it causes more players to read and react instead of just go full speed ahead. It requires gap discipline and the ability to read the play, not just put your head down and go, like they would have under Rex.
4. Okay, so the FO commits all their money to the defense and all the draft picks to the defense. They have to cut a few offensive players or let a few walk (Forsett, KO, etc) to accommodate for the defensive signings. Then Joe Flacco is left out to dry and you're upset that the FO didn't commit more to the offense.
LOL. Some people will just never be happy. Even when this team went to the playoffs however many years in a row, many still complained. Me included. It's the nature of being a fanatic. All most want is to see improvement every year. No?