There are some interesting topics in this picture.
First of all, 92% win rate in simulation and lost 15 points in reality, the randomness played a role of 43 points PD, is it a normal distribution? What's the statistic confidence?
Second, I had expressed such opinion that randomness was too much nowadays, we are playing manager game instead of rolling a dice, we can't allow a few years efforts to be so easily and strongly affected by random factors.
Third, as the OP proposed, if huge randomness continues, I suggest BBs expose the win rate of the game so that everyone can access it, then we have better analysis of the game.
In the end, I have some thoughts about what's good randomness. Randomness is key to remain suspense for weaker teams. Each shot is determined by randomness but the accumulated randomness needs to be under control. 43 PD for a 100 points game is too much and I think 20 PD max is acceptable. Better randomness adjusts itself by doing negative feedback regulation to make the game random but under control overall.