Agreed. The game already has net code and lag issues. Allowing so many high ping players in a region is compounding the problems.
I don't know if the match making system is deliberately putting Asian players in the EU region, but they are in every round I join now, enough of them to fill there own servers. I'd think there are servers much closer for them. If they are using a VPN to fake their region, then change the system to sort by ping first, not region. I'm sure the majority of players wouldn't mind waiting a bit longer to join a round, if the quality of experience was better. A quick solution, put all those with ping over 100 in their own EU server if they are they intent on playing out of region...