Masteries Update Idea

Was just wondering what the general feedback would be for something like this, but my idea is this; instead of having it sorted out as the way it currently is: Offense/Defense/Utility, why not have it just organized this way but be able to freely choose based on the tier we have our points in? To put more clarity on what I'm getting at is that as of right now, every 4 points in each tier gets you points into the next tier ultimately leading up to a point in the final trait once you reach 20 in a particular tree. But what if, I could for example, put 3 into tier 1 of Utility, 4 into tier 1 of Offense, 2 into Tier 1 of Defense, and that was good enough to advance to tier 2 in any of the 3 trees? This way i wouldn't have to commit entirely to one tree altogether. What's the overall communities opinion on this? Do you think it can be done without being gamebreaking? I'd love to see more innovation in masteries - especially with the utility tree being used more casually without thinking it's troll on 'some' champions. Just thought it'd be a nice potential update for Season 6.