We have discussed this to great extent, unfortunately guild transfers would be next to impossible and it would cause major issues across the board due to characters that are moved onto the new realm might have different names, different unique IDs and everything elated to it.
Just like you assign permissions and trust to the members in the guild who take care of the guild vault, you should do the same for the merge and have the items sorted/saved somewhere so they can be re-inserted into the guild vault. Staff can help out and make sure that prominent guilds don't lose their names.
The thing is with character names, we went into great depth when it comes to this discussion and unfortunately there's no path that we can take without someone feeling like they're neglected. So we made it able for people to at least reserve their main characters, 2 weeks prior to the actual merge and also the date/exact time when this will commence will be announced so players can take their time to reserve the names.
Of course, that's why it's a merge.
11 000 and with even more performance improvement, higher.
No, but the arena season will last for 3 months after the merge (4 months for other realms) so there's ample time to compete.
Both realms that are merging have nearly equal faction ratio so there should not be any issues, if we notice any scale issues we will enable the feature just like did in the past.
We'll be actually performing first tests later today on the old content porting. There's no estimate on when the update will come. Once it's tested, we will have a better idea on when it'll happen.
Only names that you own, correct.
Character name reservations for Deathwing and Ragnaros merge will be available Monday, May 9 at 19:00.