Timed Rotation through servers
Add a feature to allow users to build a list of servers they would like VyperVpn to rotate through. Have a radio button for sequential or random rotation, and field to specify time duration between server changes.
The user would build a list a list of preferred servers, and with the SERVER ROTATION option enabled, VyperVPN would automatically change servers every 30 minutes or whatever interval the user specifies. The rotation could be sequential through the user list (top to bottom) or random, as specified by the user.
You could add fields for automatic server selection from the list based upon min. and max. server ping thresholds.

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Edmond H. Pepper commented
Add a feature to allow automatic rotation through a user-defined list of servers. Allow selection of rotation through list to be sequential or random. Allow user to select time on each server before rotation; allow for randomization of rotation time based on a minimum time threshold.