I would like, or I suggest, a future subclasse about runes as a softer version of seals for pacts with vestiges, and other about incarnum soulmelds like the ironsoul forgemaster.
OH MY GOD! Can you guess what is my fear now? Fortnite. I mean now some player will want a subclass about creating walls and traps like in the videogames "Orcs must die" or "Fortnite: Save the world". Maybe it will be only a homebrew version.
I imagine artificer like a master of crafting single-use magic item (scrolls, potions, talismans, runes, tattoos..).
* Now I am try to imagine a story about a blue goblin half-fraal ("the little grayskin aliens were here") who is a trapper, an artificer living in a wild zone using primal magic (and a piece of psionic powers) to teletransport traps (and other biopunk tech, machines by living tissues) created in the tribe ville to hunt savage species (and sometimes enemy werebeasts). His weapons would be a crossbow what reload itself, and his mount is a mutant board with tentacles what can reload a crossbow. He found a planar rift to a demiplane with living constructs like the creatures from the videogame "Horizon Zero". Maybe it is a stupid idea but at least we need something to start a idea storm.