New Daemons? More of a threat than the old ones?

With Daemons being one of my favorite armies, I'd say that DE have zero trouble with at all.

Our missiles destroy ground targets, Lances hit all their vehicles hard and threatens ID on all their important multki-wound units (Bloodcrushers, Fiends..etc). Bigger threats with high-toughness are all meat for poisoned weapons, and any plentiful shooting will force enough grounding checks to kill the flying MCs (4+ poison shots). With the majority of the Daemon army being 5+ invul save and nothing else, things die in droves.

No worries from me at all, and I play both armies.