Be able to duplicate single slides would be great.
For e.g. when changing only one word it will be much easier than copy paste each slide content and position it.
It’s now possible to easily duplicate the current slide. This option is available inside of the templates selector which appears when you click to add a new slide.
Take a look at: http://cl.ly/image/422M1m1a2b0x/duplicate-slide-2.gif