I mean, she is a visual
I know, I know. Arguably Miyeon is the one who fits the standards the most and is noted as a visual most often, but a kpop group needs more than one that fits (not necessarily but it's always good) and Shuhua is right up there too.
But in the end we'll never know for sure. When a company debuts an idol I believe they do have a reason that we might not fully understand. I mean, I'm not saying that Cube couldn't be in the wrong for thinking she was ready to debut, but that they could've seen something in her worth of putting her in the lineup.
They must've noticed her weaknesses, how she wasn't even good in korean and probably still needed to improve
And yet they decided to debut her anyway haha
And it's kinda too little too late. She debuted so she's now an important piece of the group, probably not so much for casuals or non-fans, but for neverlands I believe she's deserving of being there just like any of the others. And that's what matters in the end.
Hope she improves and gains even more recognition