The Seahawks biggest need remaining is LB, not in terms of quality at the position, but simply depth to fill out the roster. The team only has 6 LBs (not counting the two college free agents that just signed). Unless one of those two can make an impact, the team will need to sign an additional player, or potentially keep Jason Babin as an DE/LB.
It looks like OT Kyle Williams will stick on the active roster, given that the team didn't draft an offensive lineman. The offensive line has its question marks, but the situation is what it is. The young guys should be improving, but the older guys are getting older and are on the decline at varying degrees.
The Seahawks didn't even take a flier on a WR at the end of the draft, which gives some indication as to the team's thinking on the readiness of Jordan Kent or the ability of Logan Payne, especially with the injury to Deion Branch.
Rough cut at how the roster is shaping up:
QB (3) - Matt Hasselbeck, Seneca Wallace, Charlie Frye
HB/FB (5) - Julius Jones, T.J. Duckett, Maurice Morris, Leonard Weaver, Owen Schmitt
WR (6) - Deion Branch, Nate Burleson, Bobby Engram, Ben Obomanu, Courtney Taylor, Logan Payne
TE (3) - John Carlson, Jeb Putzier, Will Heller
OL (9) - Walter Jones, Sean Locklear, Chris Spencer, Rob Sims, Mark Wahle, Chris Gray, Ray Willis, Mansfield Wrotto, Kyle Williams
DE (4) - Patrick Kerney, Darryl Tapp, Lawrence Jackson, Baraka Atkins
DT (5) - Rocky Bernard, Brandon Mebane, Red Bryant, Craig Terrill, Howard Green
LB (7) - Lofa Tatupu , Julian Peterson, Leroy Hill, D.D. Lewis, Lance Laury, Will Herring, Jason Babin (DE/LB)
S (4) - Deon Grant, Brian Russell, Mike Green, C.J. Wallace
CB (4) - Marcus Trufant, Kelly Jennings, Josh Wilson, Jordan Babineaux (FS/CB)
Special Teams (3)
K - Brandon Coutu
P - Ryan Plackemeier
LS - Tyler Schmitt