As far as artifacts and lands to avoid, there's not much. I mean, as long as you guys have fun with the cards and the cube is an enjoyable experience, you're doing it right. I would caution against overdoing lands that enter the battlefield tapped though, if you want aggressive decks to be playable in more than one color.
Cheers, and happy cubing!

Reconfiguration
I don't agree with this. I think the effect is significantly stronger than any of the other ones. It's likely worse than Hullbreacher (because it's only one color and 3 mana) ...but shutting off all extra draw and drawing the cards for yourself makes the effect far more busted than what any of the other effects have to offer. Narset and Leo are annoying when they interfere with your sorcery speed draw effects. Notion Thief is backbreaking when it has a meaningful resolution, and because it stops all instant-speed draw too, there's no workaround until it's removed. But giving all the stopped draw to you is just gross, and puts the power of the effect itself leagues ahead of the other hosers.