Not to dictate your own system to you, but it just seems to me that mechanically speaking, some machines could potentially have much higher stats is all. They wouldn't if you wanted to move everything towards a balanced, center point though, with a bias in one direction or the other. (Just going from SRW conventions. Some Supers should "really" regard mobile suits and anything smaller as fleas, and etc, or whatever balance would exist between this or that series, going from it's stated values)
So do you more adhere to bosses that are artificially inflated endurance wise like the games do because it's too much trouble to program them to use abilities, or are they about as tough, but instead fight fire with fire with abilities of their own, and perhaps, superior skills, requiring Team Work, and maybe mo bettah abilities by the players.
I am very OCD, and the first model always irked me because very few bosses should have that level of endurance compared to the size they have. (Some, maybe, but very few enemies are supposed to have such overwhelmingly superior technology. It's weird when you are supposed to be in the same ball park with your heroes mechs, but the thing has 20 times as much endurance... as the toughest thing you have, battleships the size of a city included.)