Some issues with Varus
In this topic i'll avoid his Q and R as they are his strongest and more impactful abilities.
First off he needs a better passive and W, his e is pathetic as well and none of them make a good job in fulfilling his intended fantasy. i'll try to explain their issues below.
If he's supposed to be an ADcarry then his passive is a sorry excuse for an steroid, lacking both reliability and power. And if he's mean to be a mid laner poke based champion then his passive completely misses the mark.
If he is meant to be an ADcarry his W needs to be useful besides procing the stacks. And if he's meant to be a mid laner then his W is completely out of place because the ability is useless if your abilities are on cooldown (which they are meant to be as a mid laner)
His E problem is that it sucks in both damage and utility. It's only redeeming factor it's the griveous wounds but the slow, damage and cooldown are all pathetic. Tbh i'd be completely okay if you removed the damage from this ability and gave it grounded debuff (kinda makes sense since a rain of arrows would pin down enemies) to solidify his role as lockdown disengage poke champion. this ability overall feels incredibly weak and it usually feels like it doesn't matter if you use it or not.
If Varus is supposed to be like Lucian and Ezreal then he is too mana hungry and his cooldowns are too long. Essence Reaver also barely helps his mana sustain. As an ADC his itemization options feel awkward and rely on a feast or famine playstle to work. And as AD mage (tear build) half of his kit goes to waste.
If Varus is meant to go bot lane and compete against the likes of Lucian, Jinx Ashe, Twitch then he needs to be shifted towards that role and that role only. And if he's meant to go mid and be a poke AD mage then he needs to be shifted towards that role. It'd be really coold if Varus could excel at both roles and fill different roles in many team comps but it isn't possible. At the moment Varus sucks at both and feels incomplete, and he's been a weak champion for far too long that has been relying on a feast or famine playstyle.
Varus could easily be put into a healthy spot with a little of thought and interest from the balance team but this post is problably going to be ignored like 99% of the actual balance discussions in these forums.