About Sand Force, I wouldn't say it's useless per se, but I do agree that the Life Orb set should be removed. The key about Sand Force Hippo is that it means you can run Hippo without Sand Stream. This mean it can work as a wall for non-sand teams, like rain and sun. Sand Force Hippowdon especially does well on sun teams as a check to Terrakion. The moveset would be exactly the same, so I'd suggest slashing Sand Force after Sand Stream, then add an AC paragraph on either or both of the sets to highlight the advantages of using Hippowdon on rain and sun teams.
Whatevs sig. QC member for OU and Ubers, VM me for a look at your analysis. Just make sure it's good.
Also, if you want me to rate your team (OU/DW OU/Ubers), give me a VM. If I don't rate it, it's either 1) it's so shit it's too much trouble, 2) I'm busy, or 3) the team is fantastic and I have nothing I can suggest to you. You should be able to recognise which one.