It's a joke honestly, they don't even give us a reason.
I'm not subscribed at the moment, so it doesn't piss me off too much but I just hope this nightmare is sorted out before WoD because that's when I'm planning to come back, and coming back to a dead fucking realm is seriously going to ruin my enjoyment of the expansion.
Recently it's taken them 3 weeks to connect 4 realms.
I just can't think of a reason why it would be so slow.
Lazy communication from US department? Easter holidays? General incompetence? Low priority?