Help with IMU design

[danbr]

Hi everyone.

This is my first post, and I am a mechanical engineering by schooling, but electronics has always been a hobby for me.

I'm working on making an integrated solution for a bunch of sensors on one "hat" for a raspberry pi. I'm currently working off an opensource design from adafruit(https://learn.adafruit.com/system/assets/assets/000/012/538/original/sensors_10DOF.png?1385649061) but with some different sensors for my application. And yes, I know there are many standalone "boards" that do this, but this is a learning project for me.

But not knowing much - other than the basics of circuit design, I would love if someone could take a look over my schematic and check my work?

Links to datasheets:
LSM303D - accel/magnetometer http://bit.ly/1Qo7DKL
L3GD20H - 3 axis gryo http://bit.ly/1byCZPg
LPS25H - barometer http://bit.ly/1OKFDgV
I am mostly curious about the power input smoothing/protection. All the designs I've seen work off 5v with a VR bringing it down to 3.3v with caps added. I decided to pull 3.3v from the pin header and just roll with that. Attached is my schematic in eagle and the datasheets for the 3 sensors.

Thanks!