I would argue her animations are actually ok, though could use some love. Usable though. If anything we might be able to do a Renekton-level MTU on her if we put our heads to it. That said I want her to fit into Demacia heavily. Right now the whole skin-tight body suit with boob-plate isn't doing it for the team, and we have the opportunity to make her something that still sweet, charming, really lovely, but smarten up the design a bit. Make her feel like she's garbed up in Demacian fashion for the nobility-level, light-hearted battle mage that she is.
I have some iterations lying around that we might put into pre-production. She's in a bucket of champions which we consider "high value", in that they might not need huge overhauls and the rigs are mostly healthy.
If her old Judgment stays canon, it would make more sense to have her not being fashionable like a noble. She is noble, indeed, but she was taken away from her family by the military and suffered for it until she got indoctrinated enough to uphold the values they taught her; the judgment was also about the doubt she upheld those things because she believed them or because they stuffed them in her head. In this case scenario, the IoW notwithstanding, shouldn't she be pushed on the military side of the spectrum? She was taken from her family and doesn't now have the freedom granted to her by the status of champion in the IoW. She was instructed in a indoctrinating way in a military ambient, she shouldn't really be fashioned as generally nobles are.
I don't say I'm against her being made less "military" or saying the community wants her Garened up (it's pretty much the contrary, most likely), but to preserve that old piece of lore of her, which has more than a few appreciators (there was a topic about it here around the boards), an update of her looks should tread lightly and take this into account to achieve the most coherent result. Maybe there's a way to get around it, but please don't throw that part of Lux's story away.