I totally agree the land base is "abnormal". 4x Llanowar Reborn feels slow and a little clunky. However, I played the decklist last night and I am a FIRM believer in keeping our Sac-outlet count to at least 7 or 8 cards. The Throne of Geth, Phyrexia's Core and Arcbound Ravager make the deck run so smoothly.
(My Theory on playing this deck)
The deck is all about building and maintaining "Potential energy" for a powerful finish. Our deck is unique because we can move resources around as needed. Sac-Outlets keep us in control.
I am 100% open to testing Evolutionary Leap; however, I am slightly concerned with replacing it for a "0" cost spell like Welding Jar. We have tons of "2-drops" and need to keep that count manageable. Test it out and tell me how it goes. My impulse is to replace a throne with leap and test from there.