After updating to one ui 3 on s10e , found the call screen really childish coming from the more refined and elegant looking call screen in previous versions of one ui. The box with in call functions is so prominent and also the end call button is within the box itself which does not look aesthetically pleasing. Can make the box a bit more transparent and shift it little upwards and keep the end call button at the bottom out of the box.Not happy. Hope they refine it for the better.
Just a personal tastes, some also liked the new design. You can download third-party applications such as Google Phone, and set it as default, Good luck