These days, it's hard to not leave behind a digital footprint. People can often learn a lot about you just by googling your username. I think that Enpass could really help solve this problem by offering a random username generator. The usernames could be nonsensical, or they could be created from a predefined dictionary.
It would also be nice to have a general random generator so that you could generate random values for any field, but I think this would be more difficult to implement. One possible use case would be randomly selecting an email to use from a list of your email addresses, which would also make it harder for people to track your online activities.