It would be good to be able to see what you have on all realms that are part of a connected realm instead of just the realm you are currently on.

When updating BagSync to add Connected Realm support remember that someone may have characters on more than one set of connected realms.

After thinking about this, I've come to the conclusion that this will be quite a pain to keep track of. I would have to have an updated list of all connected realms and make sure it's always updated. This list would be broken into blocks where each block contains the list of realms that are connected to each other. Unless there is an API that blizzard provides that returns if a realm is connected or not, I don't see this as being something easily implemented. I just don't have enough time anymore to make this a reality. If someone else wants to tackle it then that's great and I'll be more then glad to merge the changes. Otherwise, I don't see this being implemented anytime soon. I apologize.

Would be extremely difficult for me to test out unless I make characters on realms that are connected. I'm pretty sure my server will be merged as it's literally empty. When that happens I can take a look at adding this. I will keep the suggestion open for now for future implementation.

As something else to consider when adding Connected Reams support is guild banks. If you have characters on 2 ( or more) realms of the connected realm all in the same guild, it should only record the guild bank inventory once and not once per realm.
Keep in mind that guild names may not be unique in connected realms. That is you could have and which of course show as if it's based on the realm you're currently on.

My realm will be having a connected realm in the next couple of batches. So I should be able to update this. Currently I'm unsubscribed. I will consider resubscribing when the realms are connected. WOW has been growing a bit dull for me as of late.