Hey Corey,
Thanks for the feedback!! 
We implemented scroll snap to center for all slides so if you will try to scroll the slides manually without the arrows, the items will always snap to center
Regarding Repeaters, I will share this request with the team and in the meantime you can do it with Velo code. Here you can find some examples: https://www.editorxcommunity.com/forum/general-discussions/add-navigation-buttons-to-repeater-or-layouter-slider-mode