"Jack
What might need refining are the descriptions supplied for the attributes. I can see how one would conclude that Toy Motor would be as fast/faster, based on the descriptions. But the descriptions were added post-update, to show what things impact, not how.
For example, I would say that (based on your findings) Power has more influence over power, than responsiveness, even though they both influence it. So power+responsiveness to determine power output is not the best method, but I can see how with the descriptions for both being the same you could be led to that conclusion. But if we knew exactly how they all impact everything right away then it's an obvious "this one is the best and I am done with the update" choice, never to look at it again. But the variables are more complex than that.
I don't mean to sound defensive, but I've lost count of the amount of times someone has basically said "I didn't do as well I hoped so it's a bug". I can assure you the simulator is using the new attributes. But even I don't know exactly how each variable impacts the simulation, I can only pass on what they impact from the sim developers. They told me what the attributes impact, but didn't say how much or to what extent. I don't think it's exactly linear, and that's the only information I can give to help put the puzzle together.
yes Jack I'd share your opinion if it wasn't for me loosing out 1 second per lap because of my supliers, while on paper they were fastest, alright that could be fair cause I gained a bit in other attributes like better fuel or less tire degredation right? nope, exactly the same came in 1 lap early just like all others and my tire degredation was exactly the same as someone with the stat for it 3 points lower.
Don't say me it's intended to have all this cause that'd be a lie, it's suppose to be balanced! You're just moving the problem ahead, 1 dominant supply again and everyone will use it :S