I like the ideas, but they should probably be additions rather than replacements if they ever make it in.

Namely because the current items are pretty neat in themselves.

That's why I put "add as an option" in my post. Those of us who roleplay, and those of us who like accuracy, want the correct undershirts and jackets that hang "normally". However, customization is also nice, thus the "add as an option" lines.

I like the changes purposed and would like to see them implemented.

Agreed and I agree with the OP as well.

Quite frankly, in the cases of the DS9/TNG open jacket uniforms, I'm starting to consider it a case of 'false advertising', since out of three options, only one ever actually appeared on screen.