I expect Seattle will have a "wide open" mentality in the first couple rounds this year. If you believe what John Schneider himself said after the draft, he was strongly considering safety Mark Barron as an option at #12 if he reached that pick- despite having two pro-bowl safeties already. That might sound crazy but really it shouldn't. If you truly believe in your bones that a player will be great for your team, he should be worth considering even if it means moving a good existing player to a new position (like Kam moving to big nickle safety or LB).
Without turning this into a draft post, IMO this doesn't look like a good year to take a 1st round DT, although there are some nice DE/LB options that could be in play. There is one WR and one TE I would love to see Seattle draft in round one- and I say that as someone that has always maintained that WR/TE were not needs for this team. I still don't think they are needs, but like the Mark Barron analogy, I don't care about need if it means getting a future pro-bowler.
So rather than pigeonholing O-line, D-line, or pass rush like Seattle has done in recent drafts, I think this year they will just draft players they really like. The only position I'd rule out completely in the first couple rounds is QB. I also have a hunch that O-line is at least somewhat unlikely, unless Giacomini is in the doghouse more than we know.
As far as free agency, I expect a very different year than last year. No big exciting moves will be likely when Seattle's current $13.5 million cap estimate likely won't even be enough to re-sign all of their existing free agents. I'd strongly prefer to keep both Jones and Branch, and if they did it would eat up most of their money in two in-house moves.