But then the 1 damage should be 1/16 too, but it isn't. :D

I haven't found it, can you link it please?

I agree, usually the AS server is empty and there's a lot of Brazilians in the NA server... and ofc, me and other Brazilians can feel the Ping(MS) affecting our game play, everything having a delay to happen.
But, instead of just removing the AS server, a SA (South America) could be added, Slay.one is a example of game that have 4 servers (NA, EU, ASIA, South America) enabled which is very helpful for South America players to play with a nicer ping. Also, there's other players that aren't Brazilians but are from South America.