nRF24L01+ Antenna and Board Design

I would like to tightly integrate a nRF24L01+ with my microcontroller. I have read as much as I could, and copied as closely as I can, but the best layout required moving components from the examples. I tried to move components I thought might be less sensitive to being moved... I would love to get a more experienced opinion before I run boards. Any feedback is appreciated. Thanks!

Instead of multiple via's separating the antenna from circuit would it be better to cut a slot to more thoroughly separate the antenna or do the via's add something?

0402 components throughout. 

FA-20H 16.0000MF12Z-AC3 oscillator

I got the antenna design from: page 10

I plan to run boards from JLCPCB: JLCPCB specs