don't agree with the "Seattle ignoring needs because of Russ" angle. Before his 2nd season they traded a 1st and change for Harvin (red-hot commodity at the time), when that fell apart they traded a 1st and change for Graham. Worked out a new extension with BeastMode before he retired, gave Baldwin a hefty extension, drafted receivers like Richardson and Lockett early. They were about to sign TJ Lang but the money was even and he decided to go home to Detroit.
Some teams just struggle to develop players at certain positions, for Seattle it's the offensive line. When 10 players take up the majority of your cap space (Russ, Graham, Baldwin, Earl, Kam, Sherm, Wagner, KJ, Avril, Bennett) you can't outbid anyone for help on the line. You gotta rely on kids coming in through the draft and that's where they keep striking out.