I don’t think it’s a trend. The teams you’ve mentioned all lack a great passing quarterback…they are trying to make a virtue of necessity by using expensive assets on their running games. I don’t think it’s a formula for long-term success and those teams are not going to consistently beat teams like KC, Buffalo, Cincinnati and the Eagles, who have high level passing games.
As for the Lions, I am not a fan of their draft, as much as I like Gibbs and Laporta. They had four top-45 picks, including 6 overall, and didn’t come away with a single player at a premium position, despite their crying need at CB and, IMO, WR. The guys they selected will make an impact this year, but it was poor team-building.