recent-ish when? Nurgle Orks go back to 3rd edition, and orks feed Khorne just by fighting other races. Orks fighting Orks doesnt feed Khorne, it feeds gork and mork. >>61300473
Orks dont feel the need to perfect things. They only get as far enough as to say 'good enough', and call it a day. They also dont have a sex drive. The closest thing that Slaanesh could try and corrupt orks with is via the Kult of Speed, wanting to be the fastest, but thats a stretch even by 40k's standards.