Springs has played 16 games once in the past four seasons (16,15,9,9 not in that order). In fact, he has played a full 16 game season only once since 2000.
He doesn't need to play all 16 games. Hell, if he plays even 8 games the secondary will still be substantially bettter.
Bodden signed a 4 year extension before last year began. By the time the season was over, the worst team in the NFL decided to cut him rather than pony up that cash, as he fell from 11 interceptions to 1.
He was a CB who excelled in Romeo's defense, moved over to Detroit's cover 2, and wasn't very good. Incredibly dumb moves like that (signing personnel that doesn't fit your system) were exactly why the Lions went 0-16 last year.
Wheatley has already broken both wrists and he's only just finished his rookie NFL season on the IR.
So? The first one checked out just fine when the Pats and a bunch of other teams put him through physicals before the draft, and he's proven that he can not only play, but excel with that a metal rod in that wrist. The broken wrist that he suffered last year was an unrelated injury, and there's no reason to believe that he won't recover fine from it.
Wilhite was anything but impressive.
He beat out Deltha O'Neal for the starting job by the end of the season. Once again, for this defense to be an improvement over last year's, he doesn't have to be an all-pro. He just has to be better than O'Neal, which he already was even before he had a full offseason of NFL conditioning and continuing to learn the Patriots' defense.
The team traded away the CB that was its #1 CB last season.
And drafted the most physically talented CB that it's had since Ty Law, plus signed two CBs who are significantly better than Hobbs as FAs. All in all, I'll chalk it up as a 'plus'.
The team does not currently have a quality player with regular season on-the-field experience in the Patriots system to step in at safety should Meriweather or Sanders go down.
Didn't have that last season either. There's plenty of historical precedent for a rookie stepping in at safety and performing very well (see: Eugene Wilson), and Chung is by all accounts an extremely intelligent and motivated guy, so it's not unreasonable at all to say that he should be able to replicate that feat if needed.
Butler and Chung are rookie DBs, and we've seen the Patriots' rookie DBs have their difficulties in the past few years.
From what I remember, we won the SB in 2004 with a rookie UDFA CB starting (Gay), and in 2003 with a rookie safety starting (Wilson). Last season, Wilhite was good enough as a rookie to win a starting CB spot towards the end of the season (over O'Neal, admittedly). Plus, Butler and Chung aren't expected to be starters anyways- they're purely depth guys.
That's just the reality of what this team will be dealing with. Claiming it's not a legitimate argument is just putting your head in the sand.
And claiming that that isn't a substantial upgrade over last year is being childishly obstinate because Belichick disagrees with you on how to best build his team.