Re: A few general questions (( Includes one from RoI. ))
I haven't seen anything stated for certain, but based on the way previous crafting tiers are treated you will not need to purchase anything to access the new tier of crafting.
As for guilds, the Guild access unlock buys all of your characters permanent unlimited access to that guild - I cannot imagine you would need to purchase any extra unlocks on top of that. If there is some sort of extra reputation 'tier' (Super-Kindred?) within the guild then I'd expect they'd include it in the overall unlock.