Leona - is not broken- and why
Leona main strengh is her "cc" and most of it "scales terribly with ap". by herself she can never win 1v1 fight with skilled player unless you 100% play her top build her damage... oh by the way "Good luck with that" cause pre-6 leona is awful" and you porbably sitting at your tower given enemy top laner free farm watch is never good.
reason why leona is powerful is "teamwork" in team fights she is beast. and she so post to be. her Q should stay at 4.0 cool-down and rest of abilities are fine.
If your having trouble with leona riot team shouldnt have nerf her cause you lack ability to use tools giving too you. summoner spell cleanse is easy way shut her down.
however what riot can do is buff summoner spell cleanse watch allow players to combat these threat
then their is aftershock, aftershock is pretty powerful but its not broken. again if your having trouble against leona. then its your fault your skill not riots problem
another thing if leona misses her hook. misses her ult she in world of hurt. its matter of skill leonas hooks is easy to bait and dodge . without her hook she cant go in unless she flash auto <q> auto
please learn to play not get angry cause you messed up got hit by her full combo
watch by itself can only lower you 45-55% your hp it cant kill
if it kills it mostly cause teammates worked with leona take down target
also never focus leona in team fight. you have better targets like mid laner or adc. killing the support in 5v5 thats normally extremely tankly isn't a way to win team fights clean house then fight leona. you see shes not that strong</q>