The point has been made many times that the current map pool is inadequate, and that quality maps exist in the Workshop. Despite their good reception there is still no route for these maps to be integrated into the game.
This is absolutely an issue of balance, as no match occurs without a map. Small maps — especially Charon's Rest — magnify the power of Orks. Towers secure more resources on their own and the WAAAGH buff can threaten multiple locations at once, forcing the opponent into a guessing game. At the same time webways are made relatively useless with short travel times for both attacker and defender, and Eldar are unable to find the space they need for their shields to regenerate, or to execute a guerrilla strategy in general.
After much play-testing I'm certain the game would benefit from integrating the following maps into quick-match:
I've linked vods with high skill players in the comments on each of these maps to provide an idea of how they play.
My search has been biased toward 1v1s, so there are likely many 2v2/3v3 maps I've left out here. Suggestions are more than welcome.