There's no doubt McCarthy wants to attack the middle of the field and stretch defenses with speed at the tight end position. That's why the team brought in Cook and told Rodgers to lose some weight to get faster..
While attacking the middle of field with speedy TEs has been an obvious growing trend in recent years, and while the absence of such a TE was a woeful shortcoming in Packerland next year, McCarthy's recent comments indicated he believes the ante has been upped once again in 2016.
I alluded to the "Burfict Rule". Others call it the "Beckham Rule". For those who are not aware, it's the new rule that says a player will be automatically ejected upon receiving a second unsportsmanlike conduct call.
While neither Burfict nor Beckham incurred two such penalties, and while Peter King has observed that the dual penalties have occurred only twice in the last 3 years, I believe the chilling affect on bad behavior will be evident. This is important with regard to defensive player behavior. While Beckham's hissy fits were more pathetic than dangerous, the remaining headhunters and big hitters who prowl the middle of the field will need to dial it back.
When a guy is flagged once, he runs a high risk if he continues aggressive behavior. Getting tossed is a much bigger disincentive than a second penalty. A player can justify the penalty by thinking, "yeah, but I kept the guy from catching the ball".
The new rule is analogous to the NBA personal foul rule. An NBA player with 5 fouls is not the same defender as he is with 4 or fewer. And the earlier in the game he approaches ejection, the more cautious he's prone to be if he's not serving bench time to minimize the risk. And just as an NBA player does not want to get to 5 fouls leaving no margin for error, some NFL big hitters won't want to get the first flag leaving no margin for error.
"Burfict Rule" may not be apt because given his history you'd think he'd be the last guy to change his behavior. That will not be the case with others.