Hello, I'm the creator of the TPC. I'm glad to hear that you're planning to add the TPC into STEP. If you have any suggestions or questions about my texture choices then feel free to post them here. Texture choice is very subjective so there will always be disagreements, but at least I may be able to explain the choices I have made.
While I'm here, I'm going to take the opportunity to ask if there is anyone knowledgeable enough in texture creation to modify a texture for me. I'm currently trying to incorporate Tobes Highres Textures into the TPC, but I have unfortunately come across a flaw in one of his main textures. You can see for yourself here:
https://i1241.photobucket.com/albums/gg517/cestral/Table_Wood_SinglePiece-1.jpg
https://i1241.photobucket.com/albums/gg517/cestral/Table_Wood_SinglePiece2-1.jpg
I'm fairly certain that the cause of this is merely a couple of black pixel lines at the top of the actual texture. I could probably download some software to edit this myself, but I'm not very familiar with DXT compressions.
The texture in question is:
textures\smim\clutter\upperclass\Table_Wood_SinglePiece.dds
And of course its corresponding normal map might have to be adjusted as well, although I'm not sure if that's entirely necessary.
Tobe himself states on his mod's page that it's fine to use his work for as long as he's credited for it. So if this texture is fixed, I could include it with the TPC itself.
Otherwise I'll feel forced to go with the SMIM texture instead, but I'm not a big fan of that particular texture.