Can we swap validators if others have lower fees?

Yes, if the delegation has not been accepted yet. If delegation is still not accepted the token holder can cancel and request a new one.

But if the delegation has been accepted and/or started, the delegator has to first do an undelegation request then once the next epoch starts, make a delegation request to another validator for the next epoch. So 1 month they won’t be able to stake if they want to change a validator unfortunately. This will be changed in the future, but we are launching with this process.