Tom,
I think we should work on both side... reduce "R2+R3" to reach the "200uA Max" and also add a small cap on R3...
The idea of the small cap is to decrease the impedance that the ADC see towards the Gyro... but the disadvantage is that this cap will decrease the phase response... and should probably be compensated by a decrease of the cap between RATEOUT and SUMJ (C26).
Another question, when looking to the schematic, there is no dot on the connection C26-R2, are you sure they are connected? Is there +/- 180K when you measure C26?
Sorry for the theoretical approach... I hope to be able to practice soon...
MArc