marq2
You are able to use Vela with Orbot for example right now. I'm not going to bake it into Vela because Google degrades exit nodes and data centers with limited data. It would probably always be breaking and finicky. Even through my testing and development I've managed to screw myself a few times on a few devices.
I'm working on making it optional to load reviews via a button like you are saying. I'm all for cutting down on Google queries, both for privacy but also so Vela doesn't get screwed.
Regarding traffic, the actual routing itself is run through Google unless you turn that off (there's a setting to use Google for nothing). The traffic and the routing are one in the same, so not really a point in separating it out if we have to hit Google anyways.
If you have any future ideas or bugs, please submit them on Github, that's where I'm tracking everything.