jason -- not with you on this update. if i cut oracle from cube there would be an open rebellion and i would quickly join said rebellion.
gemstone mine is a great card that's probably worth a pick in cube, the rest of those cards are just too bad imo. with the speed of your cube especially, bosk / coliseum / wilds CIPT are big deal-breakers. paradise and caverns have their own unique awful drawbacks, though i can see caverns being good (that said, i took it out of my utility land draft because nobody ever wanted it). paradise is good for infinite landfall triggers, so i can see that working for you, but i think you're going about this update the wrong way. you and i agree that reducing the power level of fixing is questionable in cube design (since it's the aggro decks that will suffer, and it's a waste of slots), and we can see the deleterious effect of low-quality fixing in normal limited in DGR draft.
as for mine: yesterday one of our stronger drafters (two PT appearances, and surely the best legacy player in WA) made me put gaea's cradle in the main cube, so i did that (still never played with or against it).
the playset of tec edges in the utility draft was a major hit. i may reintroduce crucible as a result