Player rating for tournaments across all installments of Heroes.

Therefore, I assume all players are beginners and assign them an average rating of 25.
Fireball system: Player A - 5
B - 1.25
C - 7.5
D - 4.79
E - 1.35
Indeed, it's not very clear why E received a whole tenth of a rating more. But all of this is insignificant compared to your system, where players receive 100 rating points for some unknown Walkthrough and victory in a tournament with 2-3 participants. Even with this flawed example, my system works, but yours...

Yours doesn't even account for the differences among leaders in equally matched tournaments of 2.5. You yourself admitted that you don't really understand why players receive different ratings there.

Mine:
A - 5 days - 100
B - 20 days - 25
C - 5 days - 100
D - 6 days - 83.33
E - 20 days - 25
With mine, it's clear who received what and how much. 100 points are awarded for a pretty decent result in 5 days. All the others are based on this result. But the ratings of players from different matches for the same results are not different, which is important.