Player rating for tournaments across all installments of Heroes.

It seems we are moving further and further away from the main goal of the rating system: to clearly and simply show the player their strength in comparison to others. Instead, it's becoming overly complicated. No one will understand the final formula and will genuinely vote for the system where their rating is higher.
I think it would be better to simply decide on the principle for calculating the rating. And then adjust the existing formula accordingly.
My bonus shouldn't be too large, so as not to create an imbalance between the actual strength of the players. Indeed, it currently assumes that a newcomer has a strength of 0. This is easily fixed by making their strength 1/3 of the number of participants. That is, if there are 10 players in the tournament, the newcomer will be considered not tenth, but seventh. This is not difficult.