@georgia hindu is more a culture fold and values from within you can derive your own belief system.
True that functionally all are astik (not in the traditional sense of the vedas but bhagwaan)
but I believe it should (at least on the basis of how the culture should be) offer a lot of freedom. (Also the manner in whuch buddhists are also called hindu)
Even after putting some restrictions I'm completely fine with someone interpreting ishvara say as their conscience personified, if they treat that as a thing of beauty and elegance that the name deserves.
Ie reinterpreations that would fit an athiest palate but preserve the important aspects and their elegance are all fine.