It's probably just targeting a different feature set than you need. Personally Sheets does what I need a majority of the time. Many of the google office-like products support Apps Script[0] as well so you can build on it a bit (hence all the 3rd party addons).
You also mentioned animations and transitions for slides. Personally I like the minimalistic use of slides (it should be background to what you're actually talking about, not taking center-stage). But that's the developer in me, and I'm sure lots of business-like people out there prefer the pretty and animations.
You also mentioned animations and transitions for slides. Personally I like the minimalistic use of slides (it should be background to what you're actually talking about, not taking center-stage). But that's the developer in me, and I'm sure lots of business-like people out there prefer the pretty and animations.
[0] https://developers.google.com/apps-script/