Yeah, but there are lots of teams throughout the history of the NFL where you could say they're just throwing it up all the time. But how many of them eclipse 4000 yards, much less 5000? You can't attribute that all to the rule changes or Megatron either.
Stafford's 2012 season wasn't great, with 20 TD's to 17 interceptions (and 6 fumbles), but he still threw for 4967 yards on 435 completions. And with Megatron having having 1964 yards, that leaves 3000 yards that he still threw for to other guys.
His 2011 season, though...41 TD's to 16 interceptions (+5 fumbles).
And isn't having no run game the same as his supporting cast letting him down?
In the end, it's the era of the QB. If you have one that's above average, you pay to keep them. The Lions probably overpaid a bit, but that's just the way the league is going.
Edit: Not to bring the Cowboys into it, but I just so happened to look up Romo's stats and then the team stats. Outside of having 100 extra attempts by Stafford, the two teams are eerily similar. Mid-ranked offense (17th, 15th) with high yardage (3rd, 6th), and crap defenses (27th, 24th) with mid-ranked yards against (13th, 19th). Lions also had much better success running the ball. But outside of that...the teams are almost fucking identical. The Lions just faced a fucking brutal 2nd half of the season.
Vikings (#6 seed)
Packers (#3 seed)
Texans (#3 seed)
Colts (#5 seed)
Packers (#3 seed)
Cardinals
Falcons (#1 seed)
Bears (10-6 team that missed wildcard)
They also faced the 49ers (#2 seed), Vikings and Bears the first time around, and the Seahawks (#5 seed). To be honest, after seeing that, I'd expect the Lions to bounce back this year strongly. That's a pretty rough schedule.