Given how easy is now to level up a gatherer and how small of a difference is to raid with gathering professions, i just see people basically farming and doing their stuff, which is how it should be for the majority of the time.
The major problem is exactly that because of multiboxers, people had an infinite supply of mats in AH. We will have higher prices and kess stuff available, but more people will just go and farm the stuff they need by themselves.
Really. It doesn't take any time to craft your flasks/food for the week. If you're into any decent guild, no matter your level of progress, it won't change anything to you. People is making this like it's "the savior coming down" and/or "the sky is falling". It's not going to be either of this.
One thing i'm happy about, is to see less flocks of herbalist druids stealing all the herbs. I'm herb/alch exactly because dealing with the AH and stupid people who don't get how it works is more painful than multiboxers. I like being one man army of alts.