There is another dimension to this noise topic: Without "noise" the maps don't look natural or organic. Surely a hand trimmed English lawn looks perfect to the eye, but doesn't fit into the game's overall realism. When the goal is to create textures which always work visually a set of low noise textures is good. If the goal is to allow beautiful and realistic scenarios noise or better organic structures are essential. To my eyes the AoE shots above (both) look like cheap plastic. If you carefully work every single tile in a 0AD map, the result looks real and tiling is not an issue. So, I think, the issue is not noise versus no noise, but having textures which look good with maps build in a day and having textures for maps designed in a month.