My thoughts:
#1: Going to a Seahawks message board for quality control is a very good idea. If I was writing an article on Browns or Bills, I'd probably swing by a fan forum and have them iron out the details for me. You came to the right place.
#2: Seattle's offense is set and your starter list looks correct. I could see a few of our backup lineman playing themselves into a starting job (like Sweezy last year), but that has yet to be determined officially.
#3: The defense is far less settled particularly at LB and DT. I think our starting 3-tech in week 1 will probably be Jesse Williams, unless he continues to look like a total mess out there. Williams hasn't looked very good, but Pete values run defense first and foremost on early downs and Williams is the only 3-tech we have that's genuinely run oriented, so I think it's his job to lose right now. The next best bet would be Michael Bennett, who looks poised for a monster season as a pass rusher and who graded very well in run defense (PFF) last season.
#4: In the notable draft picks section, I'd also add UDFA G/T Alvin Bailey. He's playing at an extremely high level for a rookie and if he keeps it up I'm sure Carroll will find a place for him to start in week 1. Bailey's play has been so good that it's caught some national attention among league observers.
#5: I wouldn't put Harvin in the losses column. He's expected to make a return this season around the same time that Michael Crabtree will return for the 49ers.
#6: Replace SAM LB Malcolm Smith with Bruce Irvin / O'Brien Schofield. The week 1 starter at SAM will almost certainly be Schofield, and Irvin will likely take over from week 5 onward. Smith is a solid NFL linebacker, but is very much on the bubble to even make the roster as the Seahawks are insanely deep at that position right now.
#7: Semantics. Wilson was more than "solid" last season.
#8: Mentioning scoring offense kind of misses the point slightly. The Seahawks are not about scoring, they are about winning through control (shortening the game by running the ball, winning the turnover battle, etc). The 49ers are the same. Seattle was 9th in scoring, but were very nearly 1st in point differential despite a slow start to the season. I'd have to look it up to be sure, but I'm guessing Seattle's points per drive was probably the best in the NFL, at least in the 2nd half of last season. Their offense finished #1 in Football Outsiders efficiency rankings, and that figure even includes the first half of the year when they were scoring just ~17 points a game.
#9: As noted by others, Seattle has five 10am starts, not four. Unfortunately.