In 6+ years of flying regularly on KLM/AF flights purchased through DL, I've never once felt that there was anything close to sufficient coordination between them and DL. Virtually every flight something new there's some issue in terms of having status recognized, or published benefits provided. Luckily I haven't had the experience CJKatl did, and in fact have found both AF and KLM employees to be nice/professional, but on a structural and organizational level the JV is a mess.