Why do Eleceed’s characters look different?

I’ve noticed that not all awakened individuals look the same, and some appear more human than others, especially the strongest ones, like those in the top 50 or top 10. Could it be that when you manipulate your force control to become stronger, one of the side effects is a change in your appearance?

I’ve noticed that those who inherit force control don’t seem to have this issue, as if the one who gave it to them shared only the best part. For example, all the inheritors of the top 10 look profoundly human, while the top 10 do not (e.g., Veramonte, Astra, Schnauder.. )

This theory raised another question: Does an awakened individual who keeps their original human form mean they are perfectly managing their force control and, therefore, very powerful?

Kayden has shown how powerful he is, and Suffrey remains a top 10 despite her age. If this theory is true, could Gestella be extremely powerful (like Kayden)? Because all those 3 share the same thing, a looking human body.

I need your feedback because, even though I feel like I’m onto something, I think I’m missing something.

Ps: Eleceed is my favorite webtoon and I read it 7 times :)