You can enhance Zoho with custom views - but you cannot hide the pre-defined views.
Most users focus on 4 or 5 views.
Right now
for EVERY user EVERY time they want to move to one of their 4 or 5 views - they have to scroll down past a long list of pre-defined views - we don't use ANY of the pre-defined views.
Adding the feature to allow a predefined view to be hidden completely or only visible to certain users would be a big improvement in usability for Zoho CRM.
This feature is already available for customer views.
You simply need to extend it to pre-defined views.