Maybe it is summoners rift that has problem?
So recently i started to play more random champions, you know what i am in mood to play. Mostly i play arams and twisted treeline, with few SR to spice things up. I remember good old days when me and my not so good at league friend could spam dominion all day long and had fun. From all experience i got from those game, only conclusion that comes in mind is that SR is more stressful and i don't know has it problems? Also worth noting that i do not speak of new dominion, but the old one, with bad textures and stuff :D