The GUI is simpler if anything. Little used/unwanted settings were removed.
The day to day controls are on the first page, the more in depth settings on the second.
Go to the Settings page, look at the bottom right for the " ?" that is the Help File which details everything.
On the first page there are 4 tiles/icons, these links can be modified to your requirements for scans/virus chest/sandbox , whatever, just right click a tile and choose from the menu.
The guys I help in the workshop have 11 shops now,they install avast on everything ( unless a customer specifies something different ) and that is 100's of machines a month, customers like this simpler, clearer layout.
Yes, it is different, but very easy. Setting scan schedules is found in 3 clicks.