as someone who likes to keep things organized I really miss the feature to rearrange my runepages and masteries.
I for example want my first few pages for ADCs, then for casters, supports, then AD/AP bruisers/tanks, and finally champ specific pages.
So if I now want to make a new one and fit in the order, I have to delete and remake others behind it. That is super annoying.
Same with masteries, don't think I need to further explain this. I hope I'm the only one here who is up to 20+ mastery pages as I often just create a new one because I gave up on naming and arranging them after my core pages.