Ok now let's compare these pros and cons
Well I made a thread asking for Riven's CONS. And these are all the actual cons I got. Including her pros I also got rid of a pro due to it being well argumented against
PROS: -Ridiculously amazing early-game -AD scaling shield/dash at extremely low cooldown. AKA one of the best shields in the whole game -Mobility. One of the best and most versitile in the whole game -Ult that gives both a pretty huge basic attack buff for a long time, and a ridiculously high-damage, high scaling, AOI. -Amazing snowball potential, which works perfectly with her great early-game
CONS: -Little range, mostly. (minor con) -Vournerable to silences and Ryze's snare. -Slightly underwhelming late-game if the player is somehow terrible enough to fail early-game. And not, not fail to snowball. But fail. Even 5/5/5 Riven's are amazingly strong. Can be 1v1 almost anyone even if extremely wrecked early-game as well. -Low attack speed (minor con)
Compare this and say she's balanced.