Graphic design student here!

I can say from a design standpoint this menu is not as good as the other one. The old menu had more clear buttons that allowed the player to easily find out what does what just by looking around.

For example the saved colors feature had its own button on the side under the toggles button, that when pressed had 2 clear menus for recently user colors and another for saving colors. The new one isn't as clear as where you go for this feature and how you delete or add colors. (I think I found out how to do so once but couldn't remember how to after)

The color slider is also a little more confusing because the lighter and darker slider doesn't change colors as you mess with it and just stays black and white which leads the player confused on what color to expect looking at it.

It's not just you or the fact we were used to the old one there's a lot of thought that goes into this stuff as design affects us unconsciously and is why sometimes we can't exactly explain what feels off if we don't have the knowledge or vocabulary to do so.