As for Megatron vs Skynet... Shockwave decides to partner with Skynet and oust Megatron after first contact is made. We get Terminator/Vehicon hybrids. At first the humans are expedient pawns (why waste loyal Decepticons), then enough humans augmented with Cybertronian tech impress Megs that, after victory, humanity is absorbed into the Decepticon empire. Even if only as second or third class citizens, it still beats being seen as vermin by Skynet.
Like I said, it is a nitpick; it makes sense, I'd just like to see a "regular" Earth setting where the 'cons take a stealthier approach to things - maybe because the Autobots are a better check against them and so they play the heroes. I mean, they could use various means to take being a sort of M.A.S.K. meets Power Rangers style team.
@Nevermore Works well enough for me. If I had to nitpick, I think there are actually two different stories being forced together. A "Thunderbolts" style story with the Decepticons doesn't need Skynet... and Megatron liberating the humans from Skynet doesn't need the subterfuge, at least for long.
Specifically I'd like to see Skynet's army rise up against him (he did refer to them as an "army of slaves" in Genisys), or even perhaps a peace-minded iteration of Skynet that's existed in a humanoid form long enough to gain some compassion for the human point of view
I think across these movies, there's a very compelling story about a progressive temporal arms race driven by mutual fear in which Judgement Day keeps getting pushed back, which only gives both sides more time for technological development, and the only true resolution to it is cooperation. But cooperation will never come about because each side fears being wiped out by the other.
I'll give Genisys another thing, Emilia Clarke made a damn good Linda Hamilton. (As for Jai Courtney looking nothing like Michael Biehn, that just supports my theory that it's not always the same "Kyle Reese" sent back which would explain why John Connor looks different in almost every movie.)
The one thing that really fascinated me was how he was so adamant that his kids have to learn German that he insisted on only speaking German at home. I'm not saying that this is the one true way to do it, but I did respect him for that.