Why is the ruling on this move being changed?

[john5396]

So, assuming that MLB wants to make this old standby move illegal, how would they change the rule.

I assume they would make it illegal to feint to any base, not just first, so the pitcher would have to throw on any move to a base. Seems like this would cause much more problems, not asllowing a fent to second to drive back a runner without F4/F6 being at the base to receive the throw. Seems to me the medicine will be worse than the illness...