But it should be hard based on rarity, not based on a suddenly buggy piece of equipment working/not working in an arbitrary fashion. If there aren't as many glowing rock anymore, then that's fine. I just want to know that if a rock isn't glowing, it's because it's not what I'm looking for, NOT that it might very well be because my PWA somehow has to wait for 10 minutes for confirmation from GalNet or whatever.
It's not quite that easy though. Not sure if you simplified the case, but you certainly know (or should know by now) that glowing alone does not indicate a core, which it never did by the way. It's always a certain combination of brightly glowing pure yellow (with none or very little orange or red portions) and a certain shape, whereas the shape determines the special kind of core. VO core rocks for instance always have this rough pumpkin shape, but never these flattened stamps that some other cores can have. They are roughly round (never longish or ellipsoid) and of intermediate size.
Also, what many new miners don't seem to understand are the probabilities at which core rocks are distributed. They seem to expect only VO cores in a VO hotspot, where in reality you can only expect a higher probability at best. Other glowing non core rocks indicate things like SD or SSD deposits. Tritium is a special case that can virtually occur everywhere in ice rings and in all various forms (intrinsic, core, SD and SSD).
If people don't understand these things (and FDev doesn't bother to let us in on the finer points, apparently we're supposed to figure these things out for ourselves - which I welcome, by the way), they easily think the mechanism is broken. With VO cores, something is indeed going wrong right now, but not as bad and unplayable as many people currently think.