When you buy the upgrade for the Seneschal to be a vendor he should not be selling iron ingots, rump roasts, and the occasional pig foot.
Given who/what the Seneschal is he should have endgame recipes, gems, rings, and occasionally a top tier unenchanted weapon/armor to buy so these can be enchanted and infused. As a suggestion, stacks of 10 Fallen Embers (which get progressively more expensive/reset on rayday). At very least make him “better than Grinnich/Finley.” Not worse.
Re-posted from Sleepy’s crafting thread:
1. Embers need to be available in higher quantities well before endgame - an item breakdown system that awards embers in addition to ingots, shards, socketed gem return, and a chance at extracting torn crafting mats is a MUST. And this needs to be on top of expanding their availability in the wild.
2. Plagued zones should have an elevated Ember spawn chance for all dig sites, and most mobs should drop embers…much more commonly than you get Torn crafting mats.
3. If you don’t want to drop loot in the Crucible until the end boss - most enemies should drop embers zone by zone.
3a. Make embers the currency that the Seneschal accepts to buy weapon/armor blueprints to items/ sets which the character has discovered/picked up (and some they haven’t…refresh on rayday). There’s your xmog system. And it will put a renewed focus/importance on equipment crafting and endgame engagement.
3b. Make embers the currency that the Seneschal accepts to buy gems (guaranteed availability, variable selection).
3c. Make embers the currency that the Seneschal accepts to buy rings (guaranteed availability, variable selection).
3d. Make embers the currency that the Seneschal accepts to buy Torn crafting mats (guaranteed availability, variable selection).
3e. Make embers the currency that the Seneschal accepts to buy gold items (guaranteed availability, variable selection).
Each of these can be an “unlock” earned with glimmer.