The truss is carrying the load, not the short section of partition wall.
The rolling dunes of blown insulation looks like a pretty sloppy job. The depressions and thin spots severely undercut the average performance it does a lot better with the same amount of insulation if the top of the insulation raked smooth, with a consistent depth everywhere.
The gray/black discoloration of the fiberglass in the lower left corner of the picture is an indication of a chronic air leak. Correcting any air leakage problems would be job-1 whenever insulation is being added or corrected. Air leaks are not only an energy loss issue- air leaks also move a lot of moisture into the attic, raising the moisture content of the roof deck which in turn raises the risk of mold.