It might be fun to try an event like the "super league" where Force of Will and Force of Negation are restricted. It would be interesting to see what decks come out on top, and whether the average win turn is 0 or 1.
Is someone calling for the restriction of FoN? The point made earlier was that FOW played all 4 quadrants well. It was both protection from broken plays as well as insurance for and the ability to push though your broken plays. Negation is not because it is not free on both turns. I would argue that FOW was a necessary evil in the past but the printing of FoN and to a lesser extent Misstep has made it's necessity much less obvious.
I think the idea of a super league is a good one to be honest, I think if WOTC actually paid attention to it, it could go a long way to help inform what the format could/should look like with some drastic steps. That being said I think if you restrict FOW you very seriously do need to look at restrictions for Bazaar and Workshops.