Better/new masteries?
In my own opinion the Mastery system is a really good idea, however not as powerful as it should be. even the "must have" or important mastery stats for specific roles mathematically do not really do much outside of little changes. for example the top stat in the offensive tree "Havoc" gives 3% increased damage. now say late game, when a champion does (keeping it simple) 600 damage ignoring armor and magic resist/pen changes. havoc would add 18 damage to the ability. or in the "Juggernaut" stat in the defensive tree, given a champion with 2500 health, this stat adds only 75 health.
the mastery stats are not really game changing. some of the mastery stats have their benefits and are giving a decent amount in return, however most of the masteries really don't do anything in the game except alter extremely close situations. i understand that Riot wants to make the in game decisions make more of a difference than the masteries, but the masteries need to do something. in a mastery overhaul may make other things viable instead of the standard 21/9/0 or 0/9/21. all i ask is to make masteries have more of an impact and maybe add more total possibilities, an extreme example, 60 points per tree and 60 points total to spend more than 6 rows and more than 4 columns.
it would make more things for players to customize and make plethora of options available. having a Meta is fun and all, but it gets boring having everyone using the same mastery pages, if they are not different, then why have them in the first place? if two mid lane AP casters are both running the same 21/0/9 masteries, they may as well not even have them, its doing nothing to make an impact. please Rito, add more depth and skill to what people are bringing to the lane!!!!