His 'top-tier play' has fallen off since tank builds' damage was significantly nerfed. He almost immediately stopped being picked in competitive.
After his base HP and MS were nerfed, the Rylai's nerf is really starting to affect his usability. There's no reason Syndra, or even Sol for that matter, should be able to outrun him if she misses all of her skillshots. I've had it happen several times. Its practically impossible to go mid with him if you aren't going full-tank so you can just ignore their damage and sustain through it, but he's essentially a non-factor if you do so. That build has a 44% winrate compared to AP for a reason.
This is also the reason he's mostly played top now. He can't function vs anything ranged because they all have higher MS, higher CC, higher damage, higher range, and higher base stats than him.
Improving his options vs ranged would be a good place to start if you want to hit his ranged vs melee interactions more. How do you do that? Base MS is a good start because he'll have a significantly higher buff relative to other ranged, but still significantly less MS than most melee.