You mention the feature set coming as what is necessary to have a successful season one, but I see something missing that I hope you guys would address.
More rune pages and mastery pre-sets.
As much fun as it is to scramble in 30 seconds to rerune and remastery before a match because I happen to want to play a support champion instead of a melee dps carry is, it woudl be awfully nice to be able to just say "Oh hey, pick my support preset" and it picks the preset rune and mastery pages.
So really, that's two features I think would be needed:
1) more rune pages
2) ability to set pre-sets for masteries
2+) link the two to named preferences.
- i.e. I plan out my masteries and setup a rune page for support, call it "Support" and that now becomes an option to switch to that via the champ select screen.