On it's own, I like it. It's a nice, chunky rendition of FoC Onslaught and I've always been a fan of that color scheme. Love that vehicle mode too.
HOWEVER, I don't think it works at all with the other Combaticons. I've never been a fan of the thing with combiner teams that include one giant guy and four tiny guys. The game equalized them so all five members of the team were about the same size. In the game, the combined Bruticus mode reflects this, with a rather big-limbed look to him. But this Onslaught does away with all of that. He's back to being a giant that dwarves his teammates and, as a result of the size disparity, Bruticus loses his unique proportions.