I can say that I have a pretty good perspective on it, because, growing up, my parents never listened to country, and I never really listened to it at all until very recently. So my opinions are not really influenced by the fact it is what I grew up listening to it. I pretty much discovered Vince Gill, Keith Whitley, Waylon Jennings, George Strait, George Jones, James Earl Conely, ect. at the same time that most of these modern guys were on the radio. A couple of years ago I heard Vince Gill's "Take Your Memory With You When You Go" on a TV show, and that is pretty much what got me into country. Even though before that I played a few country songs with my last band. There are a few good modern guys, Brad Paisley is extremely talented, but his songs still pander to this modern, simple minded, every song needs a gimmick style that is being produced today. Zac Brown Band has some very good songs, and they are great musicians.
Much like myself actually, though to contrast I never got into the older stuff much, but some of the new ones you just mentioned I really like. The gimmick style to me is the business aspect of it, one cannot make a living playing what will not sell, or at least sell well. I would much rather make a living playing some gimmicky music than starve working the time clock shift and play what I think is really good artistically speaking - I can always listen to whatever I want. But that is an entirely different topic and argument.