Hello Gustaf! Disclaimer (necessary after your last post): I never suggested that an AD Leona build was actually BETTER than other builds or other characters, I simply expressed a conjecture that it would be enjoyable in noncompetitive environments, and supported its usability by stating positive aspects as parts of the whole.
Thank you Beggora, part of my point. If you need a healer bot, this gives you ammumu - level CC which other AD bruisers (even J4) cannot. Of course, being as that the entire purpose of this style was originally to hold oneself up early, the area CC is rather unnecessary, besides the fact it keeps her more relevant than most. I must say, I have never encountered anyone playing this style before, but now I want to.