I have boxed 2 alts (with me and my roomate) and just left them in town for their extra Magic Find since it gets shared across all chars. I kinda like the extra challenge the mobs have with more people in the game (their health goes up and more rare/elites). They get experience for quests even if they do nothing to help with them. They get money for quests for standing still. I bring them to the front door of dungeons for events (if there is one) so they get experience/money from it. I bring them to the boss fights, but they die about 1/2 way through since I don't move them. I haven't tried to use click broadcasting since I haven't used it for like 5+ years in WOW.

Do you really not notice your chars drifting off after a little bit of movement since no /follow?
Do you mostly rely on ranged/untargeted attacks since making sure they all face and walk the same way is hard to do?
What software do you use for your click broadcasting?
What do you do if your followers get feared (nightmared) to get them back together and facing so you can either fight or move onto the next mobs?
What has been the most use of the alts, or is it just for challenge? I liked harder mobs, more elites, more magic find and bag space.

I would love if there was just a simple /go PlayerName just like the banners in town and I would use that as /follow. I would probably use a monk for aura (mantra) and rest ranged since you will at least hit things most of the time. I would probably use Shift (hold still and attack) since it would stop them from wandering all over.