You may need to run the .dae through MAYA as well, to get textures to work correctly. For this project, it was necessary.
I haven't had a problem like that, as long as I could see the textures in the editor, they exported correctly. The DAE usually wouldn't load in blender so you have to do some text editing on the DAE file to make it load (Because it didn't like the library_effects).
Maybe it has to do with the T3D version?
//This fix broke textures when I did it.
It'll break textures in blender (Which you can fix if you re-apply it correctly in Blender) but even then, as long as the materials are applied correctly to the mesh, it will show up correctly ingame.
As long as you have these
It should be fine.