I think these guys are cool and it brings up memories of playing star frontiers.
I have a couple of suggestions:
*Have fortification start out at light and have two feats to improve it (medium fort and heavy fort).
*Give them the slippery mind ability for the oozy mind ability
*Change the different oozy body stuff to excretions so slippery excretion for oozy body and corrosive excretion for improved oozy body
*for oozy metabolism dirt should not be considered organic matter.
* Dralasites should have access to DR as a feat somehow, since their bodies are made out of "rubber" and their internal organs are deep inside of them. Maybe DR/1 for a feat and take it up to three times.
*If I remember right they could not see as well as a human.
*They generally wore a "harness" and didnt realy fit into clothes. I might do some warforged feats that gave them an armor bonus. And include that they flat out cannot wear armor other than specially made light armor.
*Also a feat that could make themselves size small would be cool- small form- or something.
*Oh yeah, they also had problems breathing in water because they used their entire bodies as their lung. They breathed through their skin. This could be an area for a penalty if you wanted to add one.
Sadrik