Community on Leblanc and many others.
Now that people are complaining about how mobile and op
is, just because she can burst mid laners to the ground early game and is relatively safe. Do you remember how ANGRY people were when Riot removed her silence calling her unviable and hopelessly weak without it.
Now that people realize how powerful she is they're like "omg she just insta bursted my at lvl 6, pls nerf." when they were saying quite the opposite before, after she got nerfed. Now she did get some buffs to balance out the silence removal and I find she is in an excellent spot right now. Same thing with Zed, he used to be just a normal assassin until mana regen got nerfed then people are now complaining about his good wave clear and base damage being out of this world. In a game like league of legends when someone is nerfed or something it can make champions stronger and weaker depending on how it interacts with them and there counter picks.
The one thing I would tweak on Leblanc is how short her ults cooldown is. It's too short for someone so bursty, it's like if heimer could upgrade every 20 seconds then imagine how broken he would be. Leblanc isn't broken, she's just too overwhelming if she get's ahead. But her draw back is her mostly singular burst and potentially poor teamfight when focused. But often champions like Lux, Xerath, Brand, Kennen and Katarina can be muchh more useful than Leblanc to the team and also much safer.
TL;DR Stop complaining just because a champion is STRONG because of META changes and try and think of a way of constructively balancing them. Zed isn't broken, he's just great because he can do fairly well against mana dependant mages. Leblanc is situational and can be beaten with smart thinking. Katarina has several weaknesses to exploit, keep cc for her ult. Tryndamere is simply kiting and timing. It's not as hard as you think to beat these champions just don't complain when you die but don't walk into lane thinking you can take them on because you want to. Play safely and wait for a gank or roam.