A non-trivial number of countries have separate signing and ratification procedures. This is common enough that no reasonable observer in international politics automatically equates the two. Most of them have procedures that mirror those of the US!
It's worth considering that changing this process from one widely understood to one widely not understood is likely to lead to more confusion about weird internal political processes rather than less.
It's worth considering that changing this process from one widely understood to one widely not understood is likely to lead to more confusion about weird internal political processes rather than less.