Far too often I find my self wasting precious time tweaking the rendering of subscripts, superscripts and exponents, because the default MathJax rendering is illegible with the default fonts. Can this be fixed? Below is a recent example from the first version of this answer. Notice how almost all of the subscripts on $\rm\,m\:$ are not legible.
I expected the rendering below, which was obtained by prefixing each subscript with \,