Cross-faction Real-ID party feature please!

Seriously, would it be that hard to make this work? Nearly all of my off-server friends are horde, and if I have to log onto a horde alt to play with them, it completely defeats the purpose of this feature.

Just make the Real-ID friends of the party leader appear as though they are a member of the party-leader's faction to avoid damaging immersion for others present, just like you do in CoT.

Ultimately, you're already going to the considerable trouble of getting this service off the ground; it can't be much more of a headache to make it work cross-faction. I'd happily pay for it if you did this.