I'm doing this "in secret" because I don't know if I'm actually going to be available for more discussion or not. I don't want to get people into this only to have the person who works on these displays to not be here.
I've also been doing a lot of cube and custom set analysis, so I have a much stronger grasp on card power level. Cards overall have been overpowered, most likely because of me, so I've been decreasing much of what I thought was too strong.
nighthawk101's suggestion of "salvage" for the war mechanic is really good. He also mentioned being nervous for tutoring, and I agree. The method of tutoring in recycle that tutors for a card lower than the converted mana cost of the recycled card feels too easy to break. In this, I sort of fused the two together, the converted mana cost requirement is still the same, however it only looks at the top X cards, where X is the amount of mana spent to activate the ability. The X activation cost is due to it being pointless to Recycle for 2 or 1 if you are only going to look at the top card, and the cost comes out to the same for cards of higher cmc. And it can take any card. I say any card, because in the past, WotC has failed when doing artifact themed sets or tribes in that they do not go well with the other cards in the set. Mirrodin in general and Esper from Alara are both good examples.
Doing this, also means that other mechanics are much better now. The "Deconstruct" ability has been changed to be for all artifacts (and only allows you to sacrifice one) and I feel is the best ability for the war mechanic. It goes so very well with the flavour of the tribe and the other mechanic, Reassemble, was tied too closely to the Thannalid's spores in the spores should be the only thing that grows/makes more of itself over time in terms of mechanics.
Reassemble basically put a charge counter on the card with this mechanic whenever you cast an artifact spell. At the beginning of your upkeep, you would remove a charge counter to put a 1/1 token onto the battlefield.