User blog comment:Deshiba/AoE Marksmen Comparison/@comment-4636093-20140331220808

Twitch is a late game giga-carry capable of destroying the entire enemy team, I'd rather he didn't also have a powerful early game too and push him into imba status.

Also I'm not so sure that giving W a base damage would be good at all. It would mean that his previous one point wonder skill now needs to be ranked up.

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The problem with adding a wounding effect to his E is that his E is used as a finisher once he has enough passive stacks on them. Whereas he'll need the healing reduction during the fight itself.

Thus he'll never have the perfect time to use it. Use it early and it will reduce the enemy healing but deal no damage, and use it late and it will deal high damage but the wounding effect will never be useful.

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Also Varus is very single target oriented, landing his ult in an AoE is rather unreliable.

If you replace him with the actual AoE-est ADC of them all Sivir then she doesn't get Grevious Wounds or high base damages of her own ether. Only her Q has any base damage at all.