Just giving my opinion here.
Stronger teams do get beaten in real life by underdogs. It doesnt happen too often but it does. Look just a few weeks ago, Stoke City beat Chelsea 2-1 or something like that.
I honestly think that weaker team beating stronger team ratio should be tweaked down a little. Cause lots of players are coming down to
the forums every few days complaining about these unnessecary losses.