The slides interface is supposed to be for the presenter, really, not for the general public. The benefit to the presenter is if someone from the audience says "I'd like you to go back to the slide where you talked about X" -- finding the slide in a 2D-organized deck is much easier by going to overview and finding the right contextual column.

I find slides.com very handy because I can present from any web browser and don't have to worry about bringing my laptop.