My only big complaint about Bruticus is that I wish he had actual feet on the frame, so he could have actual ankles instead of a weird mid-shin bend. The paint not matching doesn't really bother me, it's such an endemic problem across the line between painted and non-painted parts that I've just gotten used to it. And I guess I just got lucky on QC roulette, my Swindle doesn't seem to have any excessively tight joints.
For minor complaints, I wish Onslaught had a weapon of his own. Bonus if the team's guns could combine into big superguns like Ruination. Mine also has a scratch in the paint on Bruticus's crotchplate, but it's barely noticeable unless I look for it.
Otherwise, for what he is, I think he's a pretty good toy. I'm not 100% into the frame system, I'm certainly still not going back to get Menasor or Superion, and future sets will have to win me over on their own merits. But he's the first Hasbro Bruticus that I've actually felt like I could pick up and pose and play with it. Combiner Wars has weak elbows and lame feet, so he can't really pose. The FoC set is a horrendously janky mess. The Energon set is just kinda meh all around, with poor articulation and repeated limbs. And G1, while iconic, is a G1 brick with a big pile of parts to lose in any mode. This one is nice and big, with good strong ratchets to keep him however I pose him. I don't know if I'd count him as a combiner, so much as Onslaught wearing accessorized power armor, but I still have no regrets.