Many of these have already been reported, but here follows what I’ve tested:
Currency: Working OK, I can successfully transfer them between my characters (transfer from other characters to the one I’m logged on, and having the new amount updated on both characters).
Warband Bank: Seems to work as intented, could transfer items and reagents between characters. Was able to also deposit and withdraw gold between them. I also checked that some reagents were availiable to use from the Warband Bank (haven’t tested a lot, but some old ones were availiable).
Don’t know if it’s only for organization, but I assigned a tab for Reagents and Other for Equipment only for current expansion, yet I was able to deposit anything on them and for any expansion (except for soulbound items, which were correctly locked).
Also, cost is somewhat expensive, I’m no money farmer, but I could only purchase 4 tabs, and after I transfered the gold from my alts into my main. Feel like it’s a little too expensive, since reagents would easily fill up these tabs, or maybe I should only fill it with more usable reagents, like the Primal elements from BC, that aren’t exclusive to a single profession.
Flight Paths: I lost flight points that I already had, instead of merging the ones from all characters (Known Issue).
Reputations: l lost all Dragonflight reputations, but all my older ones are intact (Known Issue)
-Collections menu-
Appearances: Many sets and appearances have been lost. I’ve even had some items on my bag, that I previously had collected, that now shows that I still haven’t collected the appearance, and from all armor types (plate through cloth) and weapons.
Toys: lost a lot of toys on the transfer, and also lost the tag of favorites on every one of them.
Pets: Lost almost every one of them, the only ones I’ve had were either from personal achievements from that character (Perky Pug for example), in-game shop or promotions/events.
Heirlooms: Lost all of them. I was only able to obtain one of them again when I copied a character that was using one of the heirlooms.
Mounts: Seems that every one of them is here, even the ones from Pandaria Remix that I’ve recently aquired before copying the characters.
–End of collections menu–
Map: The map was fully explored on my main, that I previously had explored with as well.
I also don’t know if trivial quests, like from Outland, also count as Warband Completed Quests, but if it does, I’m still seeing old completed quests that I’ve done on an alt before.
Achievements: I “re-earned” some old achievements, yet lost some others that I already had that were unlocked in my account. For example:
- Explorer Achievements: I had the Kalimdor achievement unlocked in my main as an account wide unlock, missing only Explore Mulgore. That was reverted, and now it shows that I haven’t completed that achievement, missing only Explore Mulgore. This happens with other types of achievements, such as Quests and Reputation Achievements. I also lost the Explorer title because of this.
- Heritage and Allied Races: Missing allied races from Alliance that I’ve unlocked, and all the Heritage achievements for all the allied races.
- Tranquil Master: Like the previous, I had unlocked through alts and lost it on my main now, but I also lost some progression. In retail, I had defeated the Sha of Doubt, Despair, Violence and Anger. On PTR after copying, I only killed Doubt and Anger.
- Bloody Rare: I hadn’t unlocked this achievement on retail, but lost progress as well, killing over 11 rares on Retail but only having 3 of them on PTR.
Some of these achievements were “re-earned” after entering with a character that had earned said achievement, like Exile’s Reach and “Heritage” of an allied Race. But others that had account-wide progression such as Quests Completed didn’t get all the progress. I had 7067 quests completed on Retail and 3273 on PTR . I didn’t copy every character that I have on retail, but the number didn’t change when I copied a new one for testing.
I also tested earning the appearances on old content, which I don’t know if it’s needed for this test, but it is a Warband feature to earn every appearance on every character, right 
? Below are my results:
Earning appearances: Working OK. Most of my appearances were lost as I said before, so I was basically collecting new appearances every instance I went on. Tokens are also working correctly, being Warbound and able to be transfered and used on alts.
The test was done as following and for testing the tokens for each expansion:
- Siege of Orgimmar (Normal, used skip to Garrosh) - Essences from Garrosh
- Icecrown Citadel (H25, Deathbringer Saurfang) - Marks of Santification from bosses
- The Eye - Armor tokens from bosses
- Blackrock Foundry (Mythic) - Armor tokens from bosses and Essences (Quest item) from Blackhand
Whenever I acquire a new appearance that doesn’t belong to my armor or weapon proficiency, I’m not sent to the appearance tab when I click on the “appearance unlock” pink textbox, like I can when I get one from my type of armor/weapon. Also, sometimes when I learned a new appearance from a set that isn’t from my class/armor type, it would show in my Sets tab, but without changing the class on the new filter that was added (e.g. a Paladin Set but I still was on my Rogue filter). It’s not a problem for me, but maybe it’ll confuse some people when seeing the set/items.
