In the case of V4WM they have communicated with DAZ to find out what was and what was not allowed with respect to the EULA. If they would have followed your advise, there most likely would not have been a V4WM.

If you want to change a prop to make it more functional, you can do the same thing - ask the creator what you can and cannot do and how you should distribute the changes.

So far you have dissed most peoples work here and at DAZ as incomplete, disfuctional or ripped off. Can we see some of your handicraft in modelling?