While 500 should be plenty for most players, what we really need is mod loadouts. We have 300 characters, but only 200 mod loadouts, which doesn't even take into account different events we'd use different mod sets for, like TB, TW, assault battles, etc.
If you have any mods with less than 10 secondary speed by "blue" delete them. Waste of time and space to keep them. If you don't have characters modded, add mods to them except the most worthless at the bottom you aren't doing anything with. But if they'll be something some day, put the mods on them.