I'm not even in that camp but if I'd rolled a black and was already disappointed to get Liana, arguably the worst black in gacha, I'd be even more peeved if then everyone got her min-costed from an event. idk how they would go about compensating those players so I just don't see it happening. That said, I think that would be the best way fro everyone, I just don't know what is fair/implementable should they want to add her event. Also, she's far from a necessary unit even in her status curing niche. Any feng shui user would cover that, which considering Marr is the only current option, I think we are way more likely to just get Feng Shui unit event.