http://champion.gg/champion/Shyvana/Top
pretty poor performance in higher elos, mostly cause off her nerfs that were targeted on her performance as devourer jungler(but hey, why not simply take the 20% bonus vs monsters from W, rather gut lane shyvana...)
Aditionally we have the juggernaut rework, and darius+garren both do well vs her top, garren might have a though lane, but once she does well, she gets villian and is free food for him.
Gnar still is decently often played and screws her, vayne is super popular and one of the worst champs to face as shy, lissandra got buffed and counters her...
She never was particularry strong as a sololaner, unless she could snowball her lane or split push, and right now, garen/darius/rene/trundle do better on both, splitpush and lanebullying....
As a teamfighter, she hardly works if she's in a carry position, cause she's all about drawing aggro, but as a sololaner, you have to offer more than that in a teamfight, and doing damage only works if you are ahead ith her, else you die befor you can brake through their peel/ have no damage items.
As Jungler however, Drawing aggro away from your actuall carry poitions is fine come to lategame, they don't really need to do more than that.
And thx to devourer, she's really punishing if you don't put some focus on her.