3v3 and 5v5 Framerate Difference

With the same settings, my frame rate varies from 30-50 FPS on Twisted treeline. And when I play 5v5, my frame rate is a constant 59-60.

I think its because of all particle effects on Twisted Treeline and that Summoner's Rift got its appearance revamped a while back.

Is this something RIOT would consider looking at