Mahomes is the best QB in the league and Lamar was the MVP. No other teams right now have what the Chiefs or Ravens have with the exception of maybe GB with Rodgers. We had it with Luck. Of course Kirk isn't as good as those guys.
I have Kirk on the Above Average level. His stats and wins last season would say he is actually on the Good level. I don't think he is Very Good or Great but if someone were to tell me he is Good I can buy that. He is definitely better than Average and if I had to choose between him and Tannehill, I would take Kirk.