Adding too many animations might cause it to slow down quite significantly, as well as on older versions more complicated animations might not work very well.
WPS is the only Linux office suit to offer a Ribbon-like UI for better ease of use. Although, if you wish to keep using a classic drop-down menu style UI, you can.
Instead of being constrained by individual slides, Prezi lets you input all the various text & media you want to cover and then organise it into a logical flow later on.
This presentation application is only available through a browser, with the data hosted on Prezi servers, with all the obvious privacy concerns it induces.
Prezi helps you create presentations that tell a story. The UI lets you create a storyboard for the presentation so it's really easy to design the big picture for the presentation and then drill down to the individual "slides".