Everyone knows the 49ers O will suck. They sucked last year, therefore it's obvious they'll suck this year. Things never change in the NFL.
Things don't change for change sake though. What has improved so much that it will make them one of the best offenses in the league. V. Davis? A. Bryant? Gore? Nice players and upgrades over last year but upgrading from the worst talent at the skill positions to the 4-5 worst doesn't equate to a top 10 finish. They still have probably the worst starting QB in the league, a bad line, below average wr's, average TE's, a below avg RB. I fail to see the reason for any optimism. Seriously, besides maybe Houston, Titans, Browns, Jets and Saints (and even some of those are debatable) who does SF have an edge over at the skill positions? Will they improve from the worst probably but I wouldn't expect them to go higher than 25th.