Based on some feedback outside of this forum, I've revised the diagram (attached here) to connect grounds more thoroughly and to power the arduino and servos separately from the pi.
Will the arduino, with 12V power from the power brick, be able to support the two servos?
Would it be better to power the servos directly from the same power brick as the arduino (rather than through the arduino), and if so, is there a best-practices way to do this?
Thanks much!
