The fixing is intentionally poor, as is the removal. We actually took out bounce lands after the last draft. Tezzeret hasn't been an issue. The cards that we took out due to power level were the Bringers, Burn at the Stake, and Mirrorweave. Mirrorweave basically did everything, and while it resulted in both a suspended Covetous Dragon and persisted Covetous Dragon, it was just too much.
I've not got *that* many drafts together with it. Generally, me and the other cube designer know what's up and everyone else is kind of blind-sided when they open the packs. Hopefully we can get it going more soon.
Also, concerning the artifact deck:
You haven't lived until you've played Oona's Blackguard on a field of Arcbound guys.