I know this is a bit early, but I find that the longer one waits to make suggestions, the less likely they are to be implemented.
Artificers are one of the remaining classes with only 2 enhancements trees, and both of those trees are a bit bland. I don't feel that there is anything exciting in these trees. I have no idea who did which trees, or how much time they put into them, but it feels like artificers didn't get as much attention as other classes did back in the change to the enhancement tree system.
I'm not going to go into specific suggestions, but I'd like to point out a few things:
1) Items and item crafting are both supposed to be artificer specialities, but artificers can only get up to 75 spellpower with items, just like any other class.
2) Items and item crafting have not been updated with the rest of the game.
3) Arcanotechnician is the spellcasting tree, but it is necessary to invest many points into Battle Engineer to get the effect that gives extra spellpower when charging a rune arm.
4) The portion of "Arcane Empowerment" that effects items is only available after spending 40 points in a tree that focuses on spell casting.
5) Battle Engineer seems to assume that all artificers are going to be using rune arms, but not shields or orbs.
6) I like using Construct Essence on my own artificers. Too bad there aren't any enhancements that improve upon this feat. (Yeah, this last one is an opinion, not a fact or observation, but I had to add it.)