hey man, I love the changes you've made here. It looks REALLY solid.
I went through the probabilities for your landbase. 90% chance of green and 88% chance of black in opening seven (Those are good numbers). But only 54% chance of a blue source in the opener, and that only rises to 72% by turn 4, where you really start needing it.
I know caryatid helps, but I think you should run just 1
island (which your polluted deltas can fetch). Swap out a
forest for an
island, and that gives you 86% chance of a blue source by turn 4 without the caryatids (85% is a good rule of thumb to shoot for when you need to draw something consistently).
Since you aren't running any 1-drops, you can also afford to play a total of 8-10 lands that come in tapped, if you so desire.