Qwerty is the standard. Especially for any type of game. I don't think it's constructive to try to get developers with limited time to cater towards a minscule portion of the population who has self selected into using nonstandard layouts. Also most people in that population have the knowledge to adjust their settings to work with was.
Qwerty is not the standard of anything except the US. In fact, qwerty is not even a standard, there are many different qwerty layouts.
Do you know that UK and US keyboards are completely different, for example they have all the punctuation characters in different places.
By the way, people don't select their keyboard layouts, they just happen to have whatever they have and I guarantee you that hardly anybody knows how to change settings or want to.