I think we'd be good to go if they fixed the rosters, but the injury issue is a major one, IMO.
I'd be willing to deal with all the btks and the kicks for a month, but losing a player or two every game for 4+ weeks will get tough to deal with really soon, especially for teams that aren't as deep as the top tiers.
Making pass D more effective!? The fuck man! Will we go back to All-Pro if they do this and reduce the number of BTKs? As it is when I played Denog I could only pass to my TEs and RBs, and I only got positive yardage because Jacobs was trucking everything in sight.