It did work up to the point that David goes braindead (renegade) and Gavin runs away from the project out of guilt. The idea was sound, and the findings resulted in the organic-artificial brain interface used in the geth propaganda sidemission during ME3. Who knows what could have happened with further refinement, considering that progress was certainly being made.
That's pretty much the definition of a "grey" (whatever that means) moral choice. Sacrificing the free will of one life and the lives of a few others for the possibility of saving billions via not only neutralizing the geth threat, but co-opting the powerful consensus to work for you.
Overlord's goal was communicating with and then taking control of the Geth... which would have worked up until the point when the Reaper code comes into play. Plus an organic mind needs to rest/sleep and can't keep the control in place 24/7.
Kumon Shol discovers the ancient ruins of the "beings of light" on Klencory, which were actually the Remnant. The ruins give information on where to find a piece of ancient technology, floating in interstellar space and thus impossible to find unless you knew exactly where to look, the purpose of which is to create a wormhole to Andromeda to escape the Reapers.
Everyone assumes the beings of light did this for benevolent reasons. A colonization force goes through, as a contingency measure - the Ark Contingency, in case the Crucible fails.
Once in Andromeda, they discover hostile native species and more Remnant technology - as well as the true purpose of the Remnant, which was not benevolent.
That will be the cliche story, I would guess.
I hope not, it sounds awful. It would be a retcon, a huge mess of clichés and entirely predictable.
So of course, we'll see it in 2016. 
It's literally propaganda. The information doesn't have to be untrue, but merely presented in a completely one sided, biased manner designed to influence opinion toward a particular cause. Why does it focus on self admitted (by not-Legion and Geth VI) minority incidents of quarians defending nonviolent platforms, then skip straight from the martial law period to the quarian exodus, thus ignoring the actual war and 2 billion+ genocide in between? Why couldn't I see quarian cities being chemically/biologically WMDed, and geriatrics, children, and neutral offworld species (such as Erinya's asari partner) being indiscriminately stuck on spikes by the toasters? Why couldn't I see Council peace envoys being shot by geth without so much as a warning? Because all that happened according to other sources in the lore, but curiously is not presented in the geth's little film.
I was with you until the part with the spikes. Those were Reaper tech and not available to the Geth during the war.
I can't really blame the Geth in ME3 because they are a victim of bad writing just like everyone else.