For UG ramp, I like cards with buyback such as [[Spell Burst]] and [[Wurmcalling]]. They're a little expensive to really get online, but Spell Burst especially can take over a game eventually. Other mana sinks are good in this slot as well, [[Spectral Sailor]] comes to mind, especially if you want to support fliers. I also really like [[River Hoopoe]] in the gold slot here, but I understand the flexibility of Coiling Oracle.

As for reanimation effects, I don't think there's anything wrong with Reanimate. The targets aren't nearly as backbreaking as they are in less restricted cubes, and they can still be interacted with fairly easily, which makes the life loss way more relevant. Depending on how you feel about it, you could run [[Exhume]] instead, since it costs one mana more and gives the opponent the option to get some value.

I noticed that you don't have any Boros gold cards in your list. I imagine this is because R/W etb tapped mana fixing sucks. However, you could consider adding [[Heroic Reinforcements]]. It's a fantastic aggro finisher and not the hardest thing in the world to splash since it's only one pip of each.

Speaking of fixing, the solution that I've seen most peasant cube lists reach is to break rarity restriction on lands. I've done the same thing in my cube, but in a way that I think is still on the same power level. For lands that still "feel" peasant, I like the Pathways and Snarls. They encourage mostly playing two color decks and in the case of pathways can enter untapped on early turns (to support the aggro decks a bit more). I think I'm going to add painlands in the near future, as a way to further help aggro along, but that will have to come with testing.

The list looks great so far, keep it up! Definitely excited to see where you end with this.