During Quesada's reign many cool ideas came to be -Incredible Hercules, Agents of Atlas, Captain America, Iron-fist and cosmics, just to name a few-, but experimentation happened outside the mainsteam books, which pretty much stayed lame saving a few highlights -such as Hulk with Pak, seriously, this guy resurrected the character, he'll be fondly remember like Simonson for Thor or Miller for Daredevil-.
What I really don't like it's the ways cancellations are handled, one would think that critically aclaimed books with excellent plots and rising writers should stick a bit longer than they do. But instead of that, things are kind of retconned to feat the big events which have been incredibly lacking since Civil War -which caused mixed impressions-.
Bottomline I don't really think Q is bad, but things could be really improved and I partly blame the minor editors and the marketing group.