I’m not sure if you’re just arguing absurd things for the sake of it, but it’s trivial to disprove that — a quick check of the Naxos web site https://www.naxos.com/catalogue/item.asp?item_code=8.559704 makes it clear that they don’t consider Howard Hanson part of the title. Note how they picked a different way to credit him (“HANSON, H.”) and inserted a series name in the middle. That’s not how you treat a title.
(And they do give per-work variations in performers; it’s on the back cover or the Naxos website.)
Last, actually. I checked 10 random classical release from my collection, and 9 of the 10 have the conductor last on both the front cover and the back or inside the booklet (wherever the detailed list is); the one exception is https://musicbrainz.org/release/2bd3a0e5-1cdf-41e1-aafa-8c1b89b322bc/cover-art which has the conductor first on the cover, but not the booklet.
On the cover, we preserve that order — but for the tracklist, not sure it really matters much (and it’s often not really determinable with how its given in the booklet). But we already have ordered relationships, so sure, why not?
You already can. We happily accept edits that make the database better — in this case including a release that isn’t already present — even if the data isn’t complete. You can even add it without a tracklist (which if you’re only looking at the cover is what you’ll get).
If it were all generated from the ARs, you woudn’t have to go back and fix recording artist (etc.)
That isn’t something you have to do, it’s something you can do, if you want, once you’ve got the initial entry in (and thus have a release to point to, somewhere to upload cover art, etc.)