Its quite possible that Furniture craft was ALLREADY data mined, just go check this link

big thanks @KriHavok
https://forums.elderscrollsonline.com/en/discussion/270043/data-mining-icons-items-showcase-v2-4-update-10/p1

Interesting is esp section with "proffesions"


Forrester:


Outfitter:


Runecrafer


Smith:


So i guess this going to be all new crafts, separate from all old profesion, so we need to train them all just from the start - cos all those 9 traits furniture is going to look really good (and first tier furniture is going to be in a soul shriven (or poor folks) style ;D )
In link included before, we can see a lot of new herbs, metals, even gems that i guess going to be exclusive for furniture crafting.
This means that furniture could probably not use any of old material at all


So profesiion could work like this:
Forrester: all wood furniture -benches, beds, tables, chairs etc
Outfitter: all clothing furnitures - pillows, sofas, drapes, some finer details
Smith: all metal furniture, candelabrs, weapon racks, armor stands etc
Runecrafer: maybe stonework and smaller "shiny" accesories, like jewel stands, jewelry boxes, lights sources

i also think that this craft would obviously still use all old motifs (and posible motif stones) so player could still choose to crft like khajit chair or daedric "Sanguine" 4-person bed.
Lets say furniture style is open to player when he get a achievement for that style (or in other words when he know style in 100% - so ALL pages)
^ this could be much better then other alternative -that new pages for each style appear, and crafters will be forced to even more "craft style grind"
like +4 pages to all styles minimum (and its almost 50 craft styles now)