unfortunately i can sympathise with this, over here there are folk who can fail to call a 40-mike.....
flat 1j limit is a tricky one, on the one hand yes you can just blast at any range and not worry about what bb weight or med you're using.
but on the other hand it basically cuts out the practicality of some guns, particularly bolties and machine guns (meaning properly weighted things not those stupid all plastic m249's).
i reckon the 1.3/2.5j limit is probably about right, although if i were god of airsoft i'd be interested in seeing caliber/weight based limits, to try and get guns being used more in their proper roles.