I apologize for the silence; I just noticed that I've been appointed as the online tournament host.
1) I think the portal-style report format is very well-established and correct.
winner_NickName (color, race, main hero's race; if the host, indicate "host") def loser_NickName (color, race, main hero's race), map name, number of days.
Example:
Deep Mike (blue, sorceress, knight) def Kama (green, barbarian, barbarian), Broken Alliance, 1-4-4

2) Regarding the points system. Maybe we shouldn't use the portal's calculation system? For example, could we start reducing the winner's points only after 3-4 games between the same players, instead of 2? Or something else?
I also don't like fractional points. For example, we could multiply the specified number of points by 5. The winner would initially receive 5 points, and so on. There won't be very large numbers, and everything will be expressed in whole numbers.

3) What duration should the seasons be, based on which the results will be summarized? And how often should we calculate the results? After each new duel, or at certain time intervals?