The real reason assassins needed reworks
It's not because 1 individual assassin is broken (even though some of them were). It's because it's too easy to have a team with multiple assassins: -Katarina/Leblanc/Talon/Akali/Fizz/Zed mid -Rengar/Akali top -Kha'zix/Rengar jungle
Oh, your team survived Talon's burst? Let's just send in the next assassin (who also has tons of burst)! Oh, you survived our second assassin? Let's send in the 3rd one! These team comps are stupid and should NEVER be viable.