First off there is no more Tuck Rule. Yes, it sure as hell helped the Patriots, but I think we can all agree it's a dumb rule and I'm fine with it being gone. The 2nd one is much more controversial. The rule prohibits runners and defenders from leading with the crown of their helmets.
I think the 2nd one is dumb. I don't know how you are going to judge that each time, and it's going to completely get out of control. These rules are going too far, but it's everyone's fault (except the fans). It's the players fault, because of their nonstop lawsuits against the NFL. It's forces the NFL hands into making it look like they give a shit that you drool the rest of your life. It's the owners/leagues fault that this wasn't dealt with earlier, and that they sign these huge contracts with company's that make it tougher to get the safest equipment you can get.
I could go on and on, but the one's that are going to lose out are the fans, because soon we won't have the sport that we all love to much.