If the title of the View is not initially set and setOptions method is used then the views in the Scehduler toolbar are displayed with: 'kendo.ui.DayView', 'kendo.ui.WorkWeekView', 'kendo.ui.WeekView'...
Open the Dojo - https://dojo.telerik.com/dCcHVbSb
The default titles should be displayed even after setOptions is used.