As for the series, I will now summarise parts 5-6.
Shockwave: "YOU ARE MINE, GRIMLOCK! MINE! MINE! I WILL TALK AT YOU FOR 16 PAGES TELLING YOU JUST HOW MUCH YOU ARE MINE NOW, GRIMLOCK. I MAY SAY 'BODY AND SOUL' MANY MANY TIMES! YOU ARE MINE! MINE! MINE! MIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIINE!"
In the game: Starscream releases Grimlock back enraging him - hinted at. Shockwave increased Dinobots rage by enhancing power and reducing intelligence, he did not imply he was using mind control, merely physical control (such as forcefields/planning ahead to trap them).
Indeed, Barber has done cracking work with Transformers and I have a lot of time for him.
I suspect that some of the resonances of this story may be lost on me when I do read it, not having played FoC and all. I am now wavering slightly on purchasing it as well from what is being said here about the ending. But then - other Barber written Transformers comics will be available for my digital purchasings anyways. And at the 69pence price point I may well try it anyway seeing as it won't be hurting the wallet anyway....