It is hard to notice in the video, but the ROF at elite level is improved quite a bit, and it does more damage per shot at elite. It will in fact become HARDER to get promoted in future, because the upgraded weapons are significantly better. Also, you don't see it in the video as it never reaches Elite, but an Elite Grizzly's weapon is also a significantly higher ROF than normal.
EDIT: And yes, everything in that video is for demonstration only, it will probably undergo quite a few balance changes before we release anything,