Thanks again, stinkyattic! I went ahead and watered down the soil. Although, I don't believe that I watered as much as 3 times the volume of soil. However, there appears to be signs of improvement. I've attached a current photo, which depicts a better appearance from the more recent growth. The original leaves still look pretty bad, and I presume they'll never come back from that burn.

I did add a lot of perelite to the soil, but realize it's difficult to get that from the photos. I actually thought that I had added too much. Hopefully I'll be able to progress from here!