When creating a legend, the symbol size is that same as it is on the map. That is fine when making a small map, but when I am creating a big map the symbol size on the legend is too small. As a work-around to make the symbol size bigger, you can export the legend to a graphic or create a larger symbol by adding a marker symbol… but it is not dynamic with the map. If I change a color to a symbol on the map it is not reflected on the legend.
Perhaps on your next release, in the legend properties, make an option to increase the legend symbol size while keeping the map symbol size the same on the map.