Since Edge is not a vehicle stat, I don't think Drones themselves have Edge at all.
Always round up unless stated otherwise, that should be clarified in the future. Armor and Body should work same as with people, I think that's mentioned somewhere but can't remember where from the top of my head.
A damaged vehicle indeed under RAW has no impact on attacks, only on piloting tests. Which makes sense to me.
There's no restriction right now to being immune to Stun yes, not sure if that's under inspection by errata team or intended.
Table-duplication for certain kinds of gear was already present in previous editions and really helps imo, so I don't see the problem there.
There is no call for accusing CGL of not employing editors. If you want to rant, make a rant-topic outside the rule-section. Don't force people to read your rants to be able to answer your questions.