I don't think three films is really enough to objectively judge Blomkamp's talent. District 9 was superb but Elysium was bland (visuals and Copley aside) and Chappie was massively uneven (and I say that despite liking both). All three have some fantastic elements but the latter two obviously have their share of negatives.
I do at least hope Blomkamp works with someone on the script, someone who can help balance his shortcomings as a writer.