Based on their forum, the Roon developers do appear to listen to users. A lot of what users wanted has been included in the last 2 updates. Some things naturally do get rejected/ignored or put on low priority. You cannot please everybody.
It does not rearrange your music storage, unless you specifically ask it to - in this respect, it is similar to many other available music management software options. I would not recommend letting it (or any other software) control where your music is stored, although it might be useful if your music collection is a complete mess to start with. It's not free, you do need a credit card.
I find the artist information to be a waste of time (as mentioned by someone else, generally you don't need to be told who Beethoven was, or who the Beatles were). But the linking between artists, albums and other performers is excellent. This is what the other poster meant by "helping me work out what CD to play next". If you are listening to the Eagles, you just click on "Don Henley" and you see all the albums in your collection by Don Henley, which you can click on and add to your playlist. It also suggests other music in your collection that might be "similar". For the Eagles, in my collection it is suggesting Crosby, Stills & Nash, Neil Young and also Billy Joel (maybe a bit odd). Then you can go click on those links and add something else to your playlist. I actually do find this type of thing very useful, and I end up playing stuff that I would probably not have thought of.
It's not for everybody, but it's not garbage. Personally, I like it very much, although I agree the price is a bit steep.