What im trying to say is version 4 is able to provide a condensed layout with ability to have more features in one window. This is great to be honest.
Version has various windows to do the same. Not only users are greeted with a big start button but also even the as block lists have been assigned icons. All these take more space increasing scrolling and navigation time.
Version 4 is pretty simple and more meaningful with easy and well designed rectangular boxes for users to choose from. Not only that it has much better navigation but also a really nice way of greeting users with settings.
Listen to users and conduct a poll if you can.
PS. Material design came years prior and should not become the only reason to switch to version 5.