If you read the original post of the thread, the suggestion was to reduce fees to a minimum level required to prevent spamming the network, and remove the financial incentive to mine purely for fees.
Personally I think it would be best to do this in a gradual manner by slowly reducing the fee reward.
If we start to see a lot of nodes "dropping out" then we can always "pause" until the network strengthens again and presumably we'll reach a point of "equilibrium" that gives us the "least amount of fees" for the "most number of active nodes".
(I don't really see the imperative to make the fees so low as to completely discourage "forging" but of course lower fees does encourage more transactions)