I see stygian and sleepwalker to be the black and white of how maps can be made in the sense that Stygian is very steep whereas sleepwalker is incredibly flat. Both maps gain particular interest of different players accordingly. Me, I like stygian's steepness as it wonderfully places bodies flying in the air for me to snipe, and I hate sleepwalker for how much less it leaves people in the air due to its flatness.
I really can't see either of these maps ever becoming normal maps in the rotation because of how much push-back they will pretty much always get. (myself even for sleepwalker) That's why I recommended stygian for .1 map weight but the frequency seemed to be more than that from what I remember. I know certain players of our community will still love either of these maps so I don't see why map weight can't go in the hundreth's place (i.e .05, .07, .09).
Of more importance though, please change the rotation on the TDM server. Blade run is still on there from when it was a TR server.