One piece swimsuit design

I need some help perfecting a one piece swimsuit I am trying to design.

See photos of the swimsuit on a model from our latest photo shoot. The fabric is lurex fabric.

We can't seem to get the fit quite right and as I am not a fashion designer, I don't know how to tell my factory how to fix it. I don't know if the swimsuit is too high leg and whether this needs to be brought down a bit. The triangles part of the swimsuit is also sitting too high on her. At the back the fabric is bunching up at the crotch.

I would really like some help fixing this. I don't know if the best way would be to do a CAD to send to my factory or I'm open to nay other suggestions for how to tell them to fix it. I'm also open to changing the shape slightly if you have another ideas that might be more popular.

See examples of similar lurex swimsuits here - https://oseree.com/collections/maillots?page=1

This brand has mainly scoop necks for example. I would like some advice on what is most on-trend and would be most popular. I don't know whether to keep my original shape or adjust slightly. I'm open to suggestions and feedback.

We've done a few rounds of sampling with this swimsuit and still I can't get the fit right.