Personally, I think there's issues that have a much more pressing need to be amended than presidential requirements, even with as much distaste as I have for the use of what is now essentially undefined. See here.
Not a priority for me at all.
But I do have a very strong preference for making such changes by amendment rather than by just ignoring constitutional requirements, which has been the norm for most of the last century.
Sorry, but your Fiscal Responsibility Amendment is a Bad Idea.
Making the value of US currency highly variable by gold mines found or by technological improvements in transmutation or extraction from seawater is not wise.
Not that the process we have now is so great...
Well, that and other things, like being a Ron Paul devotee.