Does Varus Need More?

I just got Varus so I'm no expert, but I feel he needs some love. For being an immobile ADC, he needs either more CC or more damage. For example, I don't see a reason to pick him over Jinx. Her E is a mini Varus ult. on a lower CD, her W has a great slow as well as high damage, her AoE is much stronger with some items and maxed Fishbones, she can be effective from higher range, her global ult. does a lot more damage than his, her passive is far more useful in TFs etc. Ashe falls into a similar category, offering higher range than him, a better ult. imo. (stun, long-range), and better CC/utility (E, endless slows). He has decent poke but not on the level of Corki or Ezreal. His burst also isn't quite Corki, Lucian or Graves level and his AoE isn't as strong as MF's either. His scaling is average at best too. A late game Twitch, Tristana, Vayne, Kog etc. all offer far more.

Basically, what niche is he supposed to fill to ever make him a superior choice to other ADCs? I understand you don't want the same ADC in every team comp. but I can't think of any comps. where I'd want Varus over others. Most ADCs tend to have some sort of identity that makes them best in certain scenarios. Kog is best as an artillery cannon with protection. Twitch is best for stealth assassination and clumped team fights. Ezreal is the most slippery and offer a ton of poke. Sivir is the one who can offer great engages/disengages while countering key abilities with spell shield. Cork offers great burst, poke and synergy with AD mids due to armor shred. I don't see what Varus's niche is supposed to be. He's not terrible but he doesn't seem to excel at anything in particular.