Whoa hey, replies! Hi guys!
So Megatron's trial hasn't happened, no. We're set right at the start of the MTMTE timeline and have diverged into our own AU from launch. If Megatron's trial happens, it'll be way down the line, and who knows if it will. We think the best way to deal with continuing canon is to pick a point of divergence and then run with it. We'll reserve the right to take inspiration from later stuff, obviously, but we won't be beholden to it.
What we DID do is try to develop a divergence that would allow for more Cons on board. Soundwave is kind of an idealist hippie in IDW canon, and of course utterly loyal to Megatron (in EVERY canon), so what we've done is had him join the Lost Light crew with a contingent of Decepticons, partly to help with the search for the Knights of Cybetrtron to save the planet and stuff, partly to also search for Megatron, who by canon is totally AWOL/possibly dead at the moment. We wanted to allow for a greater diversity of characters to an already great crew.
And Overlord is -- well. He's the same place he was in the comics.
The Cons are definitely in a weird place, though, even before Megatron's trial. Obviously sticking Autobots and Decepticons on a ship together with a commonish cause is a recipe for a lot of tension.
As for the TS question -- no, we're pretty much of the opinion that the canon has firmly suggested Cybertronians are asexual romantics. (WIth potential for asexual aromantics, probably, but certainly plenty have romantic relationships.)