Yeah I think what's needed is an analysis of whether the stoppage time approach actually discourages negative play. I doubt it - the benefit of negative play against a team like us is more about interrupting the flow of our game and preventing momentum than it is about minutes in play.
Another solution needs to be found, that is more punishing to those teams. Or, we accept that low-mid block negativity is just part of the modern game now. I dont think many football fans want to watch that, but maybe I'm wrong.
I also think there is room for the strategy in the sport and if Arsenal were using these tactics we'd be looking at it much more favourably. So who knows.