I've used jigheads with sickle hooks, and they worked just fine. I don't, however, intend to stop using my jigheads with Aberdeen hooks in favor of them.

I have used Aberdeen hooks since I first started Crappie fishing, nearly 60yrs ago, back when fishing with minnows was about all I did. When I started using jigs for Crappie, most had #4 Aberdeen hooks, which worked just fine. When I started using weedless jigheads, originally they had #4 Aberdeens, which worked just fine. Now that I'm using larger/thicker bodied plastics on my weedless jigheads (for casting), I've gone to #2 Aberdeen hooks ... which have worked just fine. My jigheads for "Pushing" are a mix of #4 & #2 Aberdeen hooks, and they have worked just fine.

Probably 90% of the time my jig's hook will be stuck into the roof of the fish's mouth ... that's just the design nature of a jig, since the hook & the jighead tie eye are always pointing up (on retrieval & with hookset). I say "probably 90% of the time" because I do occasionally hook fish somewhere other than the roof of the mouth. But, even so, it's a rare occasion that I lip hook a fish (the most common way a fish that's hooked can come off). I rarely lose a fish, once hooked ... and because of that, I don't see any special need to change to a sickle hook.

That's just me ... you use what you have confidence in !!