I usually play as a mid/sup/jungle, but i've started to toplane a few months ago. In Brazil, singed is a very popular champ by now.
Not once, not twice, but every game i've played against singeds they were able to lvl 6- dive me, give some dmg and walk away. Towers should be, as the name say, towers. Some threat that doesn't allow the enemy to freewalk besides it.
I really think they should apply grievous wound and deal more dmg to champions.