If we made the ILS markers logarithmic/expanded centre scale, it would be easier to notice deviation trends. So half the marker travel from centre could be, say 0.25° LOC deviation. The next 1/4 of scale would go up to say 1.5° LOC dev, the last quarter up to 2.5° dev.
Boeing aircraft have had expanded LOC scale on EADI/PFD for decades, I believe from the start of the EFIS with the 767.