We've already got Cormyr. There are as much as zero improvements.
And, while the devs tried to fix Cormyr, they got the whole game broken : monsters' AI stops working and they just stand there doing nothing, NPCs don't follow the player, some doors don't open/don't react to events that should open them. It's been around 5 months already, nothing has been done to address those issues and fix the dungeons ! The developers are perfectly happy with the completely broken game and are busy with migrations and new, even more broken, dungeons for the newest expansion. It just doesn't make any sense to me.
So, let's look at it again. We are going to loose
1) Names

(I personally don't mind, but apparently a lot of players do)
2) Guild names (same as above)
3) Items in the guild chests (if we don't have some space to store them)
4) Monster Manuals
And now
5) TR Cache (if we don't have some space to store them)
(And we don't know what else will we lose in the process.)
Don't you think, that this is a little bit too much loss with migrations that no one asked for ?