Another thing that would be nice is if the Merchant Guild in Ravenshore could be made to not respawn. I think it's set to respawn after two years, along with the Ravenshore area itself? That's a long enough time if you have teleportation magic, but on solo playthroughs, you can run into trouble with that. And you really need the extra inventory space. I feel like this place was intended to be for storage, like the Harmondale castle in MM7, but having it respawn along with the area ruins that. But maybe it's hardcoded that way? I know I could use the adventurer's inn character inventory for storage, but that always feels a little unintended/cheaty. Either way, it feels bad when the game tells you to use it for storage and then overwrites your storage.
Yeah, this is one of the ills of MM8 - and worse still, the Merchant House of Alvar can sometimes fool you into thinking that it doesn't respawn, because it does only every 2 years, which is a rather long time. But still, it does - so storing items there is a no-no, even though the game itself encourages you to do so (only to bitterly disappoint you later). I do recall GrayFace releasing a text file based fix for this years ago already, it was called MerchAlvFix or something like this - I think this was in the early years of MMExtension actually. I don't remember if I still have it or whether it actually worked for me, but an integrated, permanent solution would definitely beat it. It could be equally helpful for the Merge, because there are plenty of artifacts and relics to store and not many places to do so. I personally usually just clean out most adventurers' inventories in the Adventurers' Guild and then just start dumping the rare stuff into their inventories, I've found that to work nicely. But yeah, it'd be nice to be able to use (all three?) chests in the Merchant House without fearing they'll disappear.
As for Goblinwatch, I'm not sure if it was ever intended for player inventory storage, though granted, many players seem to use it that way in their playthroughs. But yeah, that building also respawns every 2 years, so maybe it didn't in the base game or it was a bug? Some people are pretty sure they've used it for storage reliably, so no idea about that.