Nickel corners and slot coverage guys value are going to start to increase quite a bit.
CBs and safeties will naturally receive a pay increase as well, but with all of these spread sets and go routes and pass happy offenses starting to take over, slot coverage is going to become more and more important. Tyrann Mathieu is a great example of that type of player, or a more corner oriented guy like Prince Amu-Kamara (sp?) are the type of players who are going to fetch the highest sums on the defensive side of the ball.
Aaron Donald is an example of why the Dline is still crucial as well (and just got paid more than anyone), but the Rams still gave up 50+ points and their secondary looked pretty fucking bad. But, there is an accumulation of small cuts over time that can start to add up, and with offenses passing the ball so frequently, and at such a high rate, naturally more points are going to be scored and more passing yards to be had.
So to really stifle that your going to need to run coverage with maybe only 3 D line men, 4 linebackers and 4 DBs. Not a prevent defense, but a man/zone hybrid coverage with help over the top and another guy pressing the man in motion.
I think it's the complete opposite in regards to the secondary. The rules are so slanted against them that a receiver is basically always favored or it's a flag. Unless we're talking about a prime Deion, Revis, Sherman, etc. then as a GM you want to put all your money into OL, DL, WR and TE. I wouldn't put anything more than league average resources towards the Secondary. There's even some thought that instead of giving out franchise money to QB's after their rookie deal is up that you just draft another QB to save resources. The only way those offenses were being stopped on Monday was a sack or the QB being moved off their spot. Look at the Saints right now, Brees has 1 fucking pick! Look at how Mack has changed the Bears. Etc etc.
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