I wan't to suggest a new feature for the carousel addon.
I think it would be really good to be able to show multiple slides per view (see video).
I tweaked the laytheme carousel plugin to get this result, but the result is poorly implemented and will probably be lost in the next update, so i'm posting here hoping you could consider implementing later on.
What i did :
I changed the CSS for when "multiple slides" is checked, each slide is sized according to the images. I think I added the "loop" functionnality from flickity to the slider so we could infinite scroll through the slider (wrapAround: true), but maybe it was already there.
The main issue is that we must rezise the slider once images are loaded in order to be clean, if i hit the following command in the console or if I resize the window, everything works fine.
There is also an option within flickity that could solve this issues (imagesLoaded:true). I imported the full flickity.pkgd.js to be able to use it but for some reason it doesn't work. (i'm guessing you did some custom coding there)
I know you are using flickity only if the slider transition is to "slide", I think this is not an issue because it's only with the "slide" option that the "multiple images per view" carousel is interesting.
I hope you would be interesting to add this functionnality !