I've been doing a bit of experimenting with this - I've found that setting graphics to 'normal' eliminates my warnings of memory leak issues and the following game-crashes (up to this point in my testing)
High settings causes everybody to crash, no matter what system they're running. Obviously the problem must stem somewhere between the normal/high settings - in order to resolve this issue, just remove the high settings feature, and toggle with the settings between until you find a secure state for performance in high demand areas.
Most people go, high crashes, so let's set it to low (at least the players that this hasn't frightened away) however medium settings at least look presentable and I can at least say that the vast majority of these crashes/warnings are being caused somewhere between or to the end of normal/high settings. Low, I receive none but the game looks terrible. Normal, so far, the same, but the game looks decent.