NOOOOO!!!! Do you really want to see all states gravitate towards the standards of New York and California or even Texas? The standard in Washington is you pay a fee that equates to about $12/year, fingerprints, and within 30 days for a resident the government must grant your permission. That's it. That's too much, in my opinion, but I have no desire for my state requirements to become more standardized towards even Texas, let alone California.
Delaware requires this: "Arrange with a newspaper of general circulation in your County to have your application published once, at least (10) days before the filing of your application with the Court" and "Have the reference questionnaires completed by five (5) citizens from the County in which you reside. Complete the attached questionnaire and have it notarized. (The Prothonotary Office will notarize a document for a $1.00 fee)"
Do you REALLY want states to be more standard in their requirements given that we know the standard would be the direct opposite of Alaska, Wyoming, Arizona or Vermont?
The 2nd Amendment SHOULD be the license that all states are required to honor. However, knowing that will never happen, maybe the next alternative would be a Federal carry license that all states must recognize as an optional addition to their own license. For example, a person in Vermont would not be required to have any license to carry in Vermont, just as it is now, but there would be a Federal license available to a Vermont resident, if they chose to obtain it, that all states like New York and California would be required to recognize.