I would like to see National Constitutional Carry, but would settle for full reciprocity, just like we have with driving and marrying.
Use driver's license to communicate legal ability to obtain firearms - Today licenses show if a person's driving privileges are restricted or revoked, and this could be done for disqualifying actions concerning firearms. This wouldn't change any sales and purchase laws except that private citizens would know if they can legally sell to someone. This would also negate NICS.
Since the Second Amendment is protection of a Civil Right, business and organizations who invite you to their establishments or events can not ban firearms with rare exceptions (no metal around MRI, etc.).
These are just a few of what I would like to see, but more here than those we elected are capable of working through.