1. You should post feedback before you get to the point where you're pulling out your hair
It makes for less drama.
2. That handly little reference in the oRA3 options is the full /command reference, there's no "full list" to link.
3. If you don't have the option "show with raid panel" checked (meaning it will open if you navigate the social frame to the raid tab) or do /raidinfo you either:
3a. Use one of the oRA3 commands like /radur /ralag /razone etc
3b. Set a keybind from the Game keybind options to toggle the frame as mentioned in the in-game help.
3c. Make a macro with /run oRA3:ToggleFrame()
4. oRA3 can work as a replacement for most CTRA functionality, that doesn't mean it's a remake of CTRA or a clone with 100% the same features.
That's even more true since the move from oRA2 to oRA3 (oRA2 was closer to the original, provided its own tank frames etc, oRA3 the authors decided to keep it strictly raid utility and not make it an all-in-one unitframes + whatever else)
An addon matures, there comes a point where it makes its own path and stops being a better coded clone of another addon no matter if that was the original inspiration.
A voting interface is not part of oRA3, you could make your case that it falls under raid utility and post a feature request
.
Hope that covers most of it... more importantly... breathe