Interface:
The overall user interface seems interesting and easier to understand. Sadly this can't be said about the recipe names . They are very remarkable and unique so you will have no problem differentiate them. BUT: You also have no clue what they are good for. Even the categories only help you after clicking or hovering on some of the recipes to understand if you are in the right category to find what you search.

Usability:
The interface could use some help markers what stats are pushed in that category. May it be a simple green (S) for Stamina, a blue (M) for Mana or red (H) for Health or any of those combinations would be a simple and elegant improvement to the interface.

Recipe Ordering:
The patchnotes state that the recipes will be ordered by their level to speed up the search. At the moment some of the v1/v5 recipes are not in the correct order (only checked blue and purple recipes)

Ingredient changes:
There need to be detailed information about the switches between the ingredients.
Even the first look is really messy:
You change Salt Rice to "Old Salt Rice" but instead you change on of the other ingredients to Saltrice?
Even on a more detailed look it is hard up to impossible to tell what ingredient was changed for what or even how much you received as compensation.
The only IDs matching are those items that were turned into "Old"-items.
The names (and their amounts on bank or char) don't match with other ingredients.

I only focused on the ingredients after seeing the really LONG list of items that were changed to "old". Because I crafted some provisions to take a look at the v10 recipes and continued to collect on the live-server I had no way of controlling if all my ingredients were transfered correctly and what amounts to what new ingredient.

I really don't want to insult you guys from ZOS but looking at this I really don't trust this system change. Please remember that you are messing around with about 1year of collecting, sorting and organizing ingredients, bankspace and provisions also. The random shift of naming the ingredients left me with the feeling that old important items are not granted to a equal amount of new items as I would have guessed. (on some of the important ingredients that I had 2-3stacks of were not present in an equal amount of the new high recipe ingredients, couldn't check because even the IDs gave no clue what is what)
Please let us know how you change our items (to what they will be renamed)

Too be honest I was a little shocked how many ingredients will be pushed away to being useless 10gold each. Which is a lowblow considering that you are not only cutting low level ingredients but also rare or special stuff that you didn't find that often.
Another part of the revamp is that many of those now "old" ingredients were handed to you by the crafting quests. Which means that you basicly got 10-100 gold from that quest if you didn't use them before the update is released.

Overall:
Beside the chaos regarding the new ingredients and the interesting wildly new names it seems interesting and thanks to the 200 item stacking (seriously: why only 200? ) the scrolling through ingredients is reduced too. It really helps the overview and organisation.

Please adress the renaming of the ingredients, the usability of the interface and the ordering. If you fix these issues there won't be much to "rage" about.