I love this deck and decks like it. I think you need to recur the Wasteland/Strip mine with Ramunap Excavator. You probably need 2 Green Sun's Zenith and you will probably want to cut the White and add Red.
The meta-game now is very different. You need Red for Ancient Grudge or By Force and some main deck Pyroblast with Lightning Bolt. The Green Sun's Zenith will add search and better filter for you since almost all of your creatures are Green. The White does not add enough against Shop and Pyromancer decks.
If you want to keep White then your curve goes up since you really need Big Thalia and some type of good Planeswalker. Going with Red gives you a Dack Fayden option too if you want it.
Also consider JVP or Snapcaster if you go with Lightning Bolt. It will look similar to Jeskai but it will play quite differently. You are looking for a BUG deck tempo to make it work correctly with Cold-Eyed Selkie replacing Bob for card draw.
If you do keep White add Spirit of Labyrinth main, otherwise you need some hate for PO decks because they will own you. That's why you need the Pyroblasts and Ancient Grudges.