Good point, Sir Dice! 
You're right!
When OpenBSD 5.8 was released, was announced the replacement of sudo by doas.
Because it is much simpler, minimalistic. But nothing was said about security.
But OpenBSD is "paranoid" about security, so I don't think there's any reason for me to worry about that.
In fact, I never had to use all complexities of sudo. For the web manager, permissions to manipulate apache/php services, and so on.

You're right!
When OpenBSD 5.8 was released, was announced the replacement of sudo by doas.
Because it is much simpler, minimalistic. But nothing was said about security.
But OpenBSD is "paranoid" about security, so I don't think there's any reason for me to worry about that.
In fact, I never had to use all complexities of sudo. For the web manager, permissions to manipulate apache/php services, and so on.