Personally, I thought Blomkamp inserted his social commentary into District 9 with all the subtlety, grace and nuance of a suppository inserted with a piledriver. The constant "HEY, LOOK, IT'S CLEVER SOCIAL COMMENTARY! CAN YOU SEE THE CLEVER SOCIAL COMMENTARY I'VE INSERTED INTO THIS MOVIE! HEY LOOK, HERE'S SOME MORE CLEVER SOCIAL COMMENTARY! WERE YOU CLEVER ENOUGH TO NOTICE THE CLEVER SOCIAL COMMENTARY?!" ruined the experience for me. As a result, I found it to be highly overrated. The one-dimensional characters didn't help much, either.
The trailers to Elysium told me that I had no need to go see it, although I thought that it's unintended commentary about extreme liberals was probably spot on: They seem to actually BELIEVE that incredibly complex problems (such as generational poverty, providing affordable, yet high-quality, healthcare to huge numbers of poor/working class people, etc) could be fixed with the literal push of a button, but that those evil rich people are stopping it from happening, presumably for the lulz.
I somehow doubt that Movie Bob would be such a fan of Blomkamp's directing skills if Blomkamp's politics were further to the right.