First of all, let me be clear; I love Legion and profession progression is not the issue here. It's the fact that some crafted items are stupid expensive to craft (even at tier 3) and have a unrealistic trade value. I have my guild using WoD pots and flasks, as the Legion versions are just not worth it. Well, stat wisethey are, but goldwise not at all. We're talking 500+ G per potion or more, 1500-2000g for a flask. Rather simple enchants that require a dozen epic chrystals, are listed at 20-30k. I get that stuff is expensive at the start of an expansion, I've made my 'fortune' in the early days of new expansions, but I have never seen these kind of numbers.
Another example are the gear crafting profs. The materials are insane but the reward is often kind of crappy. Spending thousands of gold just to get a rather useless 815 armor piece does not feel rewarding. Waiting a few days on a World Quest that drops a 835+ item is a bit cheaper.
I don't really mind that it takes a lot to get at 800, but it feels out of balance. Who is gonna spend 20k just on pots for one raid night?