The crafting system that will ship with the Lord of the Rings Online's coming expansion, Riders of Rohan, will expand the crafting system to scale with its 10-level cap increase. The latest LotRO dev diary, by Dina "Ayvan" Monas, discusses the new crafting tier, called Eastemnet - named after the region of Rohan that players will be exploring. The new tier will work pretty much the same as the previous Westfold tier, but with a few changes.
First is the addition of new processing recipes, enabling crafters to turn low-quality ingredients (low-grade ingots, for example) into "shavings," which can be reconstituted back into low-quality ingredients.
New "processing" recipes have been introduced to help the non-gathering professions level up their craft. Metal, Wood and Leather Shaving recipes are being auto-granted to Jewellers, Tailors, Metalsmiths, Weaponsmiths and Woodworkers. Cooks will still retain their auto-granted ingredient recipes. The new processing recipes allow the above professions to level up their craft without having to waste enormous amounts of resources. Instead, lower quality ingredients can be turned into the appropriate shavings and the shavings can then be turned back into the low quality ingredient. Once you are able to crit, it is possible to get a return equal to the amount of resources you put in.
Lower-tier resources will be getting a tweak as well - gem shards will be harvestable from tier-appropriate nodes. The dev diary mentions that Adamant Shards will occasionally drop from Dwarf-iron and Platinum Deposits, Lebethron Branches and Forgotten Texts, so presumably the other types of shards will drop from other level-appropriate nodes.
Rohan will also see the return of the crafting resource instance:
We are very happy to once again have crafting resource instances that we can run on a daily basis. Scenario was kind enough to design and build these instances for us and I think they're pretty awesome! In addition to extra crafting materials, the quests and barter rewards associated with these instances will also provide legendary item support, much like the legendary item instances done for Moria and Dunland. Players will be able to acquire their Compendium, Volume IV after completing one of the quests bestowed.
With the new crafting tier comes new crafted relics for legendary items (that Compendium, Volume IV mentioned in the above quote), another level of crafting guild reputation to earn, and two full new armor sets - one for level 80, one for 85. Players will start with very automatic recipes this time around, and will have to round out their recipe books by finding scrolls in loot drops.
Source: LotRO Official Site