70-200 sized lens can't be stored in pack while attached to body.
I have this pack. And unfortunately it does have negatives. Basically, if you have a pro size DSLR or a DSLR with grip, the top compartment will be quite tight. I managed to fit a 5D3 with grip and the 600EX, but it is tight.
For the revolving chamber, lenses with diameters larger or longer than the 24-105 will be a tight fit. It seems to have been designed with smaller lenses in mind. My 85L or 24TSE fitted in one of the normal chamber will cause snags. Furthermore, most of the lenses' hoods will not fit mounted in reverse on the lens. The 70-200 is a snug fit in the middle revolving section without hood.
Despite the negatives, the pack is an excellent lens changer pack provided your lenses are not large diameter ones. And the straps along with the top compression strap makes it a very comfortable pack to wear all day.