I don't think them including their anti-cheat system and new client automatically means /follow is out, but it's a valid point that those things were all connected. Removing /follow was their reaction to the botting in BG's, but if they have better detection for that they may not feel it to be necessary. I sincerely hope they leave it in to at least see how things play out at the start.

To my knowledge the private servers banned multiboxing due to the load it caused and since it was free to play people could escalate numbers infinitely. On top of that there is a vocal group that screams about the evils of getting massacred by multiboxers, so another reason for a free server to not allow it (can scare people off from playing there). Blizzard at least makes money off of us and the population on their servers should be MUCH larger which means we aren't as visibly impacting as we would be on a private server..

Even if they allow /follow at the start they could come back and remove it just like they did before, but until then I'll feel free to speculate on teams. I did multibox in classic (and DAoC before that), so for me this is more of an exercise in remembering WTF I did back then (that, and classic, TBC, and WOTLK all tend to run together in my memory).