When I first heard about connected realms, I was excited. I thought that faction balance was inc and that they would do something like a way low pop realm with a high faction on x side with a med-high pop realm with a high faction on y side. However, it seems like faction balance is the furthest thing from their minds. Then you have the list of their next three planned connections, none of which include any of the realms I play on despite two of them being completely dead on the horde side. One you can do /who and see less then a 10m raid in the shrine. I also thought that they finally solved the issue of cross realm BoA's with this technology for combining realms seamlessly together being created. Needless to say, I am a bit disappointed. Nothing happened that I had hoped for and some of it seems like its fully their fault since they don't care about faction balance.
Sure, they said that "we cannot do it so easily since one faction prefers PvP and the other PvE", but I simply do not believe this to be true. Now, don't get me wrong, I wouldn't want realms with queue times to all the suddenly get more people sitting in that queue, but it may have been beneficial to increase the realm capacity size when they started this undertaking. It just seems like you would see a higher and better impact if you can really get a healthy faction and population going by using some of the larger realms.
I do think it a mistake to just not do any faction balancing. My friends guild quit raiding because they cannot even fill their ranks due to so few horde players being around. I think being on a realm with a pretty much no one of the same faction is just as bad as a low population.