shyvana doesn't need a hotfix she was considered a bad champion for eons in s3. she didn't outright win a lot of top lane matchups despite having one of the strongest lv2 combos in the game however a lot of those champs have been nerfed, in addition she got some tweaks. it's not like last patch gave her some random buff that made her incredible. she has always suffered from her lack of cc, her ult is decent enough these days but it's no zac/amumu/malph tier cc. shyvana brings damage and the ability to run after dudes until burnout ends. burnout times out pretty quickly if you aren't autoing to increase the duration.
she is strong at skirmishes, close quarters fights and chasing. kite her, poke her, don't fight where you will get ruptured by her aoe. she's very good on TT because at this point, she does a ton of aoe damage in skirmishes and fights. shyvana ults in, hits EWQ and you are forced to sit in her damage - like renekton and nasus in skirmishes/small area teamfights. on sr the key is to not get engaged on where you have no option but to sit clumped up for her damage to eat you alive. if you bunch for hydra fiora and yi and renekton etc you will be just as sorry.