Being able to at least mark a system as "important" would be nice; finding a hypershunt, some sort of station or a cryosleeper is worthy enough of a map marker, IMHO.
As for neutrino detector, I think the false signals are kind of important to the minigame; otherwise you're just being led by the nose, like a Skyrim objective. Being able to sniff out the false positives and identify the real signals is part of the fun of hunting. If anything, it's the cost in volatiles that kinda turns me off; having to stock up is not only expensive but cargo-intensive. I also don't often feel the need to scour a system thoroughly enough to need the detector but that's only tangentially related. If a mission says "outer reaches" I don't bother; it's never worth the effort.