I see the same questions come up all the time in clan chat, and when a few of them appeared on the b.net forums, they received Blue replies. For example, people keep asking if they should hold onto legendaries and not ID them until Reaper of Souls, to get that Transmog property. The answer, of course, is that you should hold onto your un’ID’ed legs until there’s an intense conversation going on in the Clan chat, and then ID like 10 of them at once. Blue agrees!
Legendary items found in patch 2.0.1 will unlock as Transmogrify options, and you do not need to wait for Reaper of Souls goes live to ID them. If you find a Legendary item in patch 2.0.1, then you should have the option to use it for Transmogrification once you upgrade to Reaper of Souls, and have access to the Mystic.
Another daily question regards Enchanting and “legacy” items. The answer is that items you find in Loot 2.0 are *not* legacy items. Only gear from the longlongago counts as legacy, so anything found in the current patch can be enchanted in Reaper of Souls, once you drag the Mystic out from under that heap of corpses like a Kardashian on her wedding night.
Grimiku: The items you’re crafting (or finding) right now will be Enchantable in Reaper of Souls. The crafting recipes your Artisans already know have all been updated to make loot 2.0 versions of those items, even if you learned the recipe prior to patch 2.0.1. This means anything you make (or made after patch 2.0.1) will be Enchantable. Keep in mind that there are some other limitations to Enchanting that might prohibit an item from being Enchanted (for example you can’t enchant Magical items).
Click through for the additional questions on Quest Reward items, new Paragon Portraits, and the open-ended, “what should I be doing to prepare for Reaper of Souls?” question, which is also asked almost every day in Clan chat. The only certain answer is “build up exp/Paragon Points” but there’s more nuance to it than that.