There is so much raw, underdeveloped talent on that team, it's ridiculous. The problem has been on the coaches -- IMO firing Callahan was the first big mistake. Since then, that coaching staff has been unable to tame and develop the talent they have -- therefore we see these Asomuga's and Ron Curry's who have ample talent but only shine at times. That's why I was devastated when they drafted Huff -- I love Huff, and now he's destined to a career of middle-of-the-road accomplishments until that team digs itself out of the whole it is in. And I don't see that happening while Al Davis is alive.
What that team needs is a cleanout. Not a "trade half the team for a big named star" cleanout or a "cut half our trouble makers" cleanouts, but a complete whitewash. Get some of these misused stars traded for some draft picks -- any picks. Work on suring up that young, underdeveloped, yet potentially dangerous offensive line. Get a veteran QB, draft a rookie (Al Davis' hatred for rookie QB's has set them back a lot of years -- passing on Matt Leinart, anyone?). Get them some cap room and some youth. Build the defense from scratch.
It's a long shot, and not an enviable position for a coach -- it'd take 3 or 4 years and whoever started doing it would likely be fired just as the team got good again (e.g. what happened in New Orleans these last few years).