there should, in principle; the shrinking of the world would imply more standards and not less. facts are not different in idaho than they are in new york. however, it's extremely difficult to enforce and uphold them.
in some states, deferring to local agencies is likely to be an extremely retarding process that severely harms young children. in some states, greater freedom to modernize and advance the curriculum will be used to great betterment.
there's good and bad in this and how it turns out depends on what the people in these states let and don't let happen. i'm reminded of the backlash against the abortion ruling.
this decision could very well cost republicans the house.