Trying to rescue a sick orchid

[AEKass]

Hoping to get some advice on this sick orchid I'm trying to rescue. A neighbor was going to throw it out, and I took it to try and rescue it. When I got the orchid it was planted in moss, and the condition of the roots and potting material indicated it may have never been watered.

I separated the plant from the old potting material, cut off dead roots, gave it a soak in water, and then re-potted it in the same material I have three other orchids potted in. Since repotting the condition of the leaves has declined--all leaves are rather limp, a bit wrinkled, and a paler green than my healthy orchids. The roots that are visible, however, appear to be healthy. Attached are two photos of the orchid.

The orchid is in a south-east facing window (in Chicago), and I have a humidifier to keep the humidity up. I have also been watering the orchid on the same schedule as my other orchids. My other orchids are doing well, and two have new spikes.

I'd appreciate any advice on how best to care for the rescued orchid--should I be doing anything different? Is it fine given the condition of the roots?