If Tannehill is locking on to either the left or right half of the field there is a problem there. If you only saw him stare down his target 3 times, then we saw very different things. If his throws in 3 step drops are predetermined and he never deviates, even if the coverage on his intended target is tight and the throw if made could be easily intercpeted- then Tannehill and the Dolphins offense are going to have problems. What you describe above, including receivers bunched together, sounds like a lousy passing offense to me. On a roll out you would want receivers mainly flowing with the QB in his direction, but "bunched together" sounds not good to me.