I understand the OP's concerns...and I have a few of my own (Harvin / WR/ OL) but I am far from frustrated. Now, had we NOT won 48, I would be frustrated right now. But getting our title has changed my outlook immensely. Of course I want to repeat, but I want a repeat about 25% as bad as I wanted our 1st. House money now, IMO.
So how much weaker is our D without Clem, Red, Thurmond? Not much, but let's call it - 3 pts.
I suggest we bolster the OL, grab another wide out and IF Harvin can play the entire season, those 3 things should get us no less than an additional 7, maybe even 10 pts per contest. A healthy, happy, protected RW with talent to throw to, would make our pt differential even more impressive than last year and that gives us a very good chance of repeating while extending Earl at the same time. More than 1 way to skin a cat. ..and all that.