Dual lands just aren't great because you need so many of them. When you need at least 4 of them (6 being ideal) to have a decent 2 colour + splash mana base the fact that they enter tapped becomes a big deal. Rainbow lands help significantly in getting to an ideal mana base without the same issue, as you only need 2-3 of them for the same effect. I was looking at Grumgully, the Generous in my RW deck for the persist combo, but the cost of inclusion using only duals was just too high for the chance of a 3 card combo occurring to even pick it. Even ignoring their effect on mana bases, rainbow lands still massively outperform gain lands in drafting as they go in substantially more decks while taking up less space in the pack for the same amount of fixing.
I generally just do drafts until early pack 3 when I'm trying to figure out a cube, since at that point your strategy is basically entirely decided, so as a consequence my drafts don't get saved.
You should definitely have more rainbow lands if you're expecting people to play combos spanning 3 colours; I did some mock drafts and I couldn't really justify going into a 3rd colour for a 3 card combo with just 1-2 duals. Terramorphic Expanse, Evolving Wilds, Ash Barrens, City of Brass, Aether Hub, Gemstone Mine, Mirrodin's Core, and the Vivids are all much better than the gain lands if you're trying to splash. Also, I see why the original Karoos are in here, but I'd be fairly surprised if they're not overkill for the decks that combo with them.
I think that basically all the conspiracies are first pickable regardless of whether they help you combo or not. I'm not sure if that's an issue for you or not, but I figured I should point it out.
I generally just do drafts until early pack 3 when I'm trying to figure out a cube, since at that point your strategy is basically entirely decided, so as a consequence my drafts don't get saved.
I think that basically all the conspiracies are first pickable regardless of whether they help you combo or not. I'm not sure if that's an issue for you or not, but I figured I should point it out.
Is there a reason you're not playing more conspiracies? Assemble the Rank and Vile and Secrets of Paradise in particular seem very on theme. I'm also kinda surprised at Reassembling Skeleton and Hermit Druid not being included for the same reason.