Hard disagree. You already have enormous inventory space, the also huge crafting bag and a decent enough void storage. The fact that toys, mounts, pets and transmog items stopped taking inventory space is also huge.
So no, it does not need an overhaul. At all.
i rarely have inventory issues and i usually only have 50-60 free space.
yeah sure in zones like mechagon and korthia your bags fill up with junk, but vendor mount.
yeah sure if i go farm a old 12 boss raid that drops 5 items per boss i'm going to have issues, but if you really don't want to delete/not loot there are always workarounds. you can just have most of it send to your mailbox, engineers have it easy, does proving ground teleport still work? etc.
my pet peeve with inventory is items im not sure i can delete or not, i probably still have that tear of elune from legion lying around somewhere even though it never was useful for something ever again.
I could go for a server/account stash. Hell just make void storage useful.
Soulbinding materials to rid of the bag slot would be a nice compromise. 1000 silk cloth becomes a "currency" after soulbinding it, just meaning you intend on and have to use it yourself or else it rots as a useless currency.
We still have tabards that can't go into void storage...I have several of them that I worked my butt off too get and can not buy them again in game...we still have dozens of items I would class a toys but they are not and not in toy area.....I have 5 private guild banks to store mats ...battle pets and stuff....what would be nice is too be able to stack battle pets...like 20 of same to one slot..instead of having to use 20 slots for same battle pet.
The most difficult thing to do is accept that there is nothing wrong with things you don't like and accept that people can like things you don't.
One thing I really would like server/cluster-wide reagent tab with a ~50k limit or something, where all reagents goes in and all characters can add or withdraw from this common pool.
Also, if just blizzard stops giving up bag-filling Anima Power / Artifact Knowledge, that would solve a lot.
I've played since vanilla, and this patch is the first time I can even remember where bag space is ever the slightest concern. In that today I do actually run out, and have to pop up my vendor mount to sell crap, and have to hand-in items every day or I'll fill up all my bags. The last time-- maybe that was in vanilla, leveling up before I got all 16 slot bags? Like I'm sure everybody here, I have all 32 and 34 slot bags now.
Aside from tons of anima and research items, I have over a dozen random items needed from the maw, stuff from longer-term quests like the stygia dowser, various keys, and maybe 25 slots filled up with covenant crap, souls, seeds, catalysts, catalyst seeds, it all adds up and none of it stacks over 20. I could bank a lot of that crap, but it isn't strictly necessary so long as I vendor greys and hand-in anima/research regularly, so I don't. It's just a lot of cruft, and it's unnecessary, and it's annoying.
This is very far from the biggest problem with WoW, Shadowlands, or even patch 9.1. But it is a problem.