This is how I felt about it too. Certainly better than I thought it would be.I actually quite liked World War Z.it exceeded my expectations as I never thought I would like it.
WWZ was a production travisty, the whole airplane ( yea right), going down and ending up in Wales?!?!? just terrible, movie didn't know what it was half way through.
Elysium is basically the scrapped plans for a Halo movie and what was left over.
Did you miss the part where it was on approach to a welsh airport?
Seen both now, had low expectations and wwz came out as the better film for me.