If put erthtkv2, abd and lenshu3ng as the only mods for the whole season then it goes against the very idea of finding out who's the best Toribash player around. If you can only play 3 mainstream mods, you aren't best. Mods put in this voting all imply different gameplay, especially grappling/striking mods.
It's not like we're suggesting you to play lolnade3 or twinswords for ranked mode.