Riot doesn’t favor certain champs in balancing decisions, and even if they did, then Taliyah would not be one of them. Her playerbase has always been tiny and is even smaller now.
They hotfixes her because the patch dumpstered her. Her winrate was 43%, and her pickrate dropped to around 0.5%. These changes weren’t bandwagon players failing to adapt and then leaving. Her sub-Reddit was in mourning, with one thread being press F to pay respects, another being about crying at the changes, and yet another being a somber video about how it was “Better to have loved and lost than never loved at all”. The other threads were packed with comments like “Goodnight, sweet princess,” “Murdered in her crib before she even got a skin,” and “Born and died on the same day”. Mains were telling new players not to pick her up and speaking openly about finding other champs for themselves. These are some of the sweetest and most dedicated players you’ll find.
Riot wanted to equalize her solo-queue and competitive performance—not give her the Kalista treatment! So, before the champ were abandoned, they gave her a bunch of damage in a hot-fix and hoped for the best. Without her insane lane priority and worked-ground movespeed, she’ll never be the competitive power-pick she was, but now at least she’ll have the chance to be balanced in both arenas.