I think that the new rune system will narrow the width of the players build and playingstyle.
Some people loves FULL AP Heimerdinger for beat a top melee(sry darius:)),
and Annie highly need MS runes.Someone loves money runes,or something etc.
Many people find pleasures in construction of the original rune pages.
I loves and very often use a full ARMR runepage when play a tank.
Though we used to use the usual rune(ADorAP9,AR9,MR9,pen9,etc),
but rioters please dont think everypeople use same runepages,
dont forget many people have so many original runepages.
I think the variety of runes have possibility to create new meta.
To be sure, how to choice runes is a only way of summoners BRAIN(not hand) can affect the games strategy to win.
so save its variation,fun of think.
sorry terrible english.