This is my wife's biggest complaint besides the rune held limit! She can't stand that she can't see how close to the cap she is. I agree completely and would love it was at least this was added for now!
I understand that it would take more server storage to be able to increase our rune held limit but Gree- @ShisaDS please consider it! Runes are suppose to be one of the most engaging, fun, and challenging parts of the game!
The problem also comes from not being able to properly sort them! If i was able to sort the runes and see which ones i needed to get rid of faster then maybe I could have a little more room, more often. This wouldn't solve all the issues because there are still many runes I want to "save for later" ,that count as a part of my inventory, because of the randomness of the rune system I may never get a certain stat combination again if I was to fuse certain runes.
With the amount of new heroes coming out(it has slowed down, which I am actually disappointed with, just give us "more" content already!)there are also many runes I want to save for potential future heroes or for certain heroes for when their legendary comes out. There are also different builds for different heroes, such as bard-where you can go any combination of flame/bolt and blood/rock/tree.
So when you add all of these different runes a player might want to save, in addition to all of the different sets, plus the poor sorting feature, the 500 rune held limit really starts to cause a hindrance in play- regarding runes.