Well Reasoned Top 5 Balancing Needs (Underpower)

There are a lot of threads of folks venting at Riot for nerfing their champ, and often times they are fresh off a loss, or miss the times when that champ was terribly overpowered. Maybe the champ is still very good - but maybe not. Let's have a well reasoned discussion about what champs are the weakest, the least fun to play but still loved, or make the game annoying/slow without having any actual positive impact.

Include:

• Why the champ needs to be balanced(low win rate? low pick rate? wimpy mechanics? not fun to play?)
• Evidence of the above(aka data supporting the claim, or a well reasoned explanation if the champ is not "bad" but could use some polish to provide more fun)
• What specific portion needs balancing
• What you might do to balance it

Please: Be respectful of others. If you disagree, do so politely. People will be talking about their favorite champs, which are like treasured friends to us.

And please, on-topic posts only.