Lincang teas can really taste like green tea as a whole, and I suspect part of the enduring charm is as a keepable green tea. Of course, this means that green tea puerh will be a bit harder to tell.
Hongchapu isn't so bad, and those guys do eventually age. I think there is a distinction to be made here. There's hongchapu with leaves fermented before the shaqing process. That's not so bad. Then there's hongchapu with a poor shaqing process with many leaves not fixed, and your bing turns all red. That's bad, because the energy of the tea dissappears and it gets all mild and flat, where with the previous example, if you sample it, it's aging from that set point, and the fermented flavors like malt won't increase.
The third guideline is the most problematic--I suggest an age limit, in that if a tea doesn't taste that much (specifically a low taste volume) as a three year old, then that tea's probably bad. Some areas like Yiwu can start off light, and you'll need to figure out what is a light taste and what is a low volume taste.
There are lots of cakes that are bitter and doesn't yield huigans. For instance, I'm not really a fan of most Lao Man'e, because the yield, frankly, is not worth it. There are other Bulangs with that tendency as well. But beyond tea from areas that are just really bitter, bitterness without huigans as a general rule is a major tipoff that something is wrong, and most bitterness like that will not feel natural. Paying attention to astringency matters the same way. The top stuff? It's one of three things. It's ultra smooth. The astringency will store flavors in your mouth. The astringency will give character to the body and leave a pleasant feel in the mouth. Like with bitterness, a young tea can be very astringent and still be promising, if it feels right and behaves. On the other hand, a bad tea will have an astringency that makes your mouth feel wierd, sticky, funky.
I'm not sure about the thin and without substance...that's personal preference to me, and I do like the silky and thin teas. I suppose it's better to say that the tea should feel like something. If it's like hot water, well, you know, there will be plenty of other things wrong with that tea.
Too many silver tips is easy. Too many tips makes the tea boring and lacking in MEAT. So, sweet 'n bland/insipid. Tips adds sweetness, but your broad leaves should be doing the same, too. So you shouldn't need too many tips in that cake. You judge by whether the sweetness is balanced by real flavor. If it is, then no matter how the tips are, you're probably going to be happy with the aged cake. Tippy teas do have their place, if you know what to expect and know to consume them.