I appreciate the feedback! And yes I think the flat / rendered look is a balance. For the app icon I’ve gone from maybe 30% flat to 65% flat, much less shiny 3D. 
I agree the logo should work as a pure SVG - so this has a ‘just gradients’ version without any fancy effects. Makes it lightweight and scalable for web etc.
All in all, the branding may look something like so:
