I have the sme lens,it does take a bit of work to get the best from it,thats for sure...my ones`s sharpness sweet-spot is F11,not best for a moving subject..though you can push the ISO with the 7000 further than i can my 90. I too get lens envy when i see one of those lovely sharp 70-200 2.8s .. Oh,nice shot though,even with a soft lens .
Sorry for the slow reply! I think I am going to have to get in the habit of upping the ISO and stopping down a bit more often . I had a D90 before and I'm still in the habit of resisting upping the ISO much (so keeping the aperture wide open) which is probably not the best balance of settings.