During the 2009 NFL Draft, there was a lot of teams that were successful in their choices. The 49ers were one of them with them drafting Michael Crabtree and a quarterback of the future Nate Davis, but there were certain areas that the 49ers didn't look to fill.
One is offensive tackle, which last year wasn't a weakness but choosing another one this year could've helped whichever quarterback who wins the quarterback competition stay upright. The left tackle position looks shored up with 2007 First Round Draft Pick Joe Staley playing on that side, but the right side is in question. With the loss of Jonas Jennings because of inconsistent play, and decent play by Adam Snyder, the position is still in question.
If the 49ers selected one of the tackles in the draft then they could have fixed this problem. They have looked to fix this problem with the of signing offensive linemen Marvel Smith from the Pittsburg Steelers.
Another hole that wasn't filled was at outside linbacker, with the 49ers using the 3-4 alignment they need a pass rush outside linebacker to put pressure on opposing quarterbacks. Since they didn't draft an outside linebacker in the draft, that means that they believe that their 2007 First Round Pick Manny Lawson, will eventually provide that pass rush that they haven't gotten yet. They also must believe in their other outside linebacker Parys Haralson who recorded eight sacks last year and they also signed him to a multi-year contract.
With the 49ers not filling these holes there could be lasting effects that won't help their goal to make the playoffs. This will affect their goal because without an adequate right tackle then the quarterback who wins the quarterback competition will not be protected.
Also, without an adequate pass rush outside linebacker, the 49ers won't be able to protect their secondary from receivers getting open and opposing quarterbacks from having a lot time in the pocket.