Maya :: Photoshop / Unity - Looking For Texturing Workflow

I'm working on a hobby project for a game in Unity3d. When it comes to texturing my Maya models and bringing everything into Unity, I often find myself lost in a very tedious workflow. How to organize the texturing process between different applications.Here is what I'm doing right now: 

1. export UV snapshot from Maya and open it in Photoshop
2. use premade textures, photo reference and hand painted images in PS to build a diffuse texture
3. export as an image file and check it on the model in Maya
4. go back to PS, adjust and start building a specularity/gloss map, as well as use premade normal map textures or hand painted bump maps to create all those different maps
5. export layer groups from PS into individual texture file (diffuse, specular, normal, emission etc...)
6. assign everything in Maya and check if it looks ok (I prefer doing this in Maya, so I could change the model or UVs if needed)
7. export another set of texture maps from PS to meet the requirements of Unity (diffuse with gloss in Alpha channel ect)
8. assign and test everything in unity and make prefabs for my developer
 
As you can see I spend a lot of time on exporting up to 6 versions of one texture for different purposes for Maya and for Unity. Everytime I want to change something, I have to manually go in and re-export and refresh those textures. I'm trying to use actions in Photoshop and a Mel script in Maya to make that easier, but still it's a lot of tedious work spent on just updating images. 
 
I actually started off using PSD networks in Maya. I would create my material, let Maya create a PSD file with different layer sets assigned to my shader and let it all refresh at once without having to export. That sounds like a reasonable workflow, but I stopped using it, because networks with layer sets only support flattened Photoshop data, so no layer effects and non-destructive editing from within PS. And every once in a while my PSD network would break and corrupt my PSD files, making it impossible to save them or open again.