User blog comment:Aphostropils/A short statement on new masteries/@comment-24420226-20160110181812

It sounds like you want a larger number of masteries. Which is not inherently going to increase diversity amongst what masteries people actually choose.

In a competitive environment like league where people are trying to use the objectively best options, people will always gravitate towards the most generic and versatile tool - in the case of masteries, it is Thunderlords (which is made more popular by the versatile strength of the hybrid penetration). Thunderlords and the hybrid pen mastery are useful on the widest range of champions in the widest range of scenarios. In a specific case a different master might be more powerful, but Thunderlords is rarely a bad option. Adding more options isn't going to make people stop picking Thunderlords, and it is only going to add white noise to the system that will confuse less experienced players.

Also, increasing the number of masteries available may also need to radically change the mastery system, which may also entail changing the account levelling system where you get one mastery point per level. This isn't a bad thing; honestly, I think Riot needs to sit down and have a long disscussion about the account levelling, how it limits new players, and generally encourage broken systems (like runes) for the sake of what amounts to a skinner box that becomes irrelevant within a month or so of playing. But that's for a different post. I'm only saying that, in the context of potentially adding more masteries, on may need to overhaul the foundation on which that system is built first.