I love the set up and am not sure what is meant by there are no mid range gears. I have a 10spd 11-28 on the back 50 34 up front. when changing the front I click 2 either up or down on the back depending on which way I am going. I find it has plenty of top end plenty of low end and lots of choice in between.
While I am not stellar at I do some climbing and during some climbs I have dreamed of a quad I have not found the low end to be lacking to get me through some tough climbs