Awesome, may I ask for some implementations:
1. Clan Icons (HighScore)
2. Nation + option to sort by nation
Could you elaborate what you mean by highscore? We're working towards clan icons and that'll be available shortly. It is not possible to determine a player's nationality from WL APIs. I could try to go scrape player profile pages, but not too keen on that at the moment.
I have two questions regading the elo-system:
Which value does K have?
K=32.
How do you plan to make sure, that there is no inflation/deflation in the elo-system?
I picture this system as a "closed" one. The amount of rating points available are always proportional to the number of games played and the player count. When new players enter the system, they start at a base rating which fluctuates based on their performance. However, the points available in the system does not vary much.
The only case when points "leave" this system(which can lead to deflation) is when a high ranked player decides to leave the ladder and take their earned points with them. However, games expire every 5 months, so all these points are "returned" to the system after that.