Any advantage to new Dynamic Launch Mode in WoW?

I was reading about this new feature and wondering if I'm missing why I would want to use it in WoW.

[lax]

Dynamic Launch Mode does not really have a compelling use for World of Warcraft.

One of Dynamic Launch Mode's purposes is to help support game launchers that launch mutliple accounts, though. So if you use the Battle.net Launcher to launch your team, don't want to close/launch that multiple times, you could potentially just leave the launcher open and click Play for each account.

Its other main purpose is for people who simply want to select a random set of Characters at any given time and have it fill in to their Window Layout, without regards to what Character is in what window and supposed to be doing what. I would not say this is common use