Just downloaded and had a first look. Quite a different user interface than its predecessors.
Although it looks attractive for light users - home users - with only one or two sheets open at a time, the interface is probably inappropriate for enterprise users. An enterprise user could have up to 20 or 30 linked workbooks open at a time. Excel's solution is a secondary dialogue box that lists the sheets, whereas this interface for WPS Office changes the size of the tabs at the top of the screen, thus making them unreadable. Enterprise users would also have longer filenames than the typical home user, too.