I think if they did random stat modifiers they would use your gameplay stats so that you sort of generate your own. Kinda like the backburner, if you charge into the fray, maybe you get a tad more health. If you rocket jump a lot, maybe you get less damage per jump. Of course this can be farmed. But I don't know. I did a pretty miserable job trying to predict the last two updates, so I'm not going to put too much of my chips into predicting anything else they are going to implement.