One of mine did what I call a “hybrid degree” with upper-level classes in several areas that did not overlap, involved prerequisite sequences, and included “real science” even beyond the weeder cores. I would not recommend this for most pre-professional students or even for most folks who plan to enter a field where employers screen by GPA rather than competence for entry-level jobs or internships. 3.5 seems to be the new 3.0, especially in fields outside of STEM.
For most purposes, a high SAT or GRE score in the math section is enough to prove general quantitative capabilities, in the eyes of employers who are looking for this. Whether this would also predict scientific literacy is another question entirely.
Fwiw, I have heard many scientists complain that MD’s lack true scientific literacy unless they have also completed a full science major, including math classes beyond the minimum required for medical school admissions.The reasoning is that math is the language of science as it is now practiced. I suppose everything is relative.
But, I am not sure that the answer is to require that H/SS majors be required to pass through heavily curved weeder STEM classes in order to graduate, any more than I would like to see STEM researchers held back by classes that would require an ability to read and write rapidly, or master a foreign language at a high level. Frazzled kids did not in practice see STEM majors who needed to complete multiple lab reports and p-sets flocking to intensive foreign language classes or classes requiring hundreds of pages of reading per week in droves, either.