That's just wrong piled on top of wrong.

The theatrical cut of Léon (or The Professional, as it was retitled in the US) was the same the world over, including France. It was Luc Besson's own cut - it just happened to discard some of the scripted and shot scenes (mostly for pacing reasons, except for one which was deemed a little near the knuckle for international - particularly US - audiences).

The version intégrale reinstated the discarded scenes to create an extended version, but not a director's cut per se (if I recall correctly, its cinema release was Besson and Gaumont's gift to bored office workers in the summer of '96!)

I saw the original on its cinema release, and the extended version a couple of years later when it had a UK screening. It was an interesting experience, and one that I still enjoy from time to time, but it's by no means an improvement on the taut, streamlined original. You may prefer the longer version, but the original is 'completely shite'? Come on.

Anyway, since both have their (occasionally hyperbolic) supporters it is right for them both to be included in future releases. An accurate 4K transfer would be very welcome, but I don't imagine it's terribly high on Sony's list at present.

As for Memento, there have been two transfers, haven't there? Are they both equally poor?