relaunch means a complete vu and gameplay update imo.
the next time were gonna get something of that scale would probably be either morde or poppy. if thats the guinsoo rework though, she should get a pretty large gameplay update.
her ult was to change entirely, and reduce the cooldown of all her base abilities for a number of spells to something like .5 seconds. her q would probably stay. her w was to become sort of a mini kayle ult. making her briefly invincible, so she could dodge spell projectiles aswell as attacks with it. her was probably to change entirely aswell.
i dont think fiora needs a vu of a larger scale than ashe when she got hers. basically exactly the same model and textures with increased resolution and smoother animations.
personally, im excited if that happens. he wanted to turn her more into a mechanically intensive, agile melee carry more fitting to her theme as duellist and fencer. more similar to yasuo, instead of an assassin without escape.