Opinions on Varus buffs/kit changes?

He's been lackluster for quite a while now. The recent buff to his ult width has helped, but I think Varus could use a bit more help.

When playing him, his style has always come off as that of a sniper to me, solely because of his Q, Piercing Arrow. Visually, it's the most stand out spell in his kit. It feels unique. However, it isn't strong enough to make him viable for his poke alone. It doesn't make up for his lack of mobility. A max of 1.6 ad ratio sounds strong on the surface, but less so when you compare him to other carries. Boomerang Blade reaches 2.05 with no windup. Zap! reaches 1.4, reveals, and can slow for 70%. Meanwhile, Varus' Piercing arrow is extremely telegraphed because of the 2 second charge time. It's unreliable because most player's have extra time to react. I love the charge time though. The animation that goes along with it is what makes the ability appear powerful.

To match it's power with the visuals, I would enjoy a "sweet spot" so to say. If Varus releases his Piercing Arrow within .5 seconds or so after reaching max charge, give increased damage and/or missile speed. Maybe even add armor pen instead, fitting the name "Piercing Arrow". A visual and audio cue for the sweet spot would be necessary.

While his Q is pleasant to use already, the rest of his basic abilities feel like they make much less of an impact. Hail of Arrows seems tacked on just to pop Blight stacks. The slow often doesn't make much of a contribution in a fight. A bonus effect to popping 3 Blight stacks might help this, such as an added slow that stacks with E's slow. A different effect for each ability for popping 3 stacks would be great, in fact. A slow when hit with E, maybe armor reduction after being hit with Q, and a longer root time for ult.

These are just personal ideas, though. Do you agree that Varus needs a buff or change? What would you suggest?