Oops. Button got pushed, huh, Matt?
Don't get me wrong: I believe as you do, that many writers do get pretentious and go too far to slather descriptors on a wine. That's the nature of writers though. They want to make sure you get the point; and they want to do it "artfully" (or what they think is artful).
But that's no different from winemakers who do the same over-excess to wines, and manipulate and jamjar them to death!
I like Schildknecht's writing. Obviously, you don't. I find his descriptors evocative. Then again, I'm not (or I like to think I'm not) the "Average Joe" of wine drinkers either; I can certainly see some of his descriptive embellishments both confusing and exasperating certain readers. Like wine, we all have different tastes in wine critics.
I dare say many of the specific citations you pointed out would be relished (pardon the weak pun) by the FLDG people in Robin's palace of many rooms. Many of them speak to me very clearly. And yes, some do not. And yes, some go too far out of the realm of standard knowledge or interest.
Sandalwood? I know very well what that scent is. I expect you've been exposed to it in your life; you just chose to not pay attention or "register" it in your sense memory. But it's pretty common, if only in cheap candles. The difference between beet and beet root? That can be pretty profound---but yes, only if you eat a lot of beets (or, in my case, if you generally despise beets because of a childhood-developed aversion).
White pepper tinged black fruits? No problem there. That's just a slightly dressy version of a standard descriptor of a certain type of wine. Rhubard? I know what that is. Haven't you ever smelled/tasted rhubarb? If not, you should. To me it's like saying cranberry: I can relate to it easily. Lilly of the valley? Again, no problem, and a descriptor I have been known to use for certain wines. Beef juices? Yup. I'll admit to one of my blind spots though: acacia. For some reason that's not cemented into my sense memory very clearly, and I don't find it to be a trigger word.
But everyone is different. Hey, maybe you don't have any taste, Matt!
(I don't think that, by the way; not at all. And I do think you have grounds for complaint. Some of the more flowery writers should exercise a little restraint. Some of the poorer writers should just stop. I think Schildknecht is very definitely NOT a poor writer: I think he's a great writer who gets so damned enthusiastic at times that, yes, he can go 'over the top'. I can forgive him that.