About the second requirement, changing the period for remembering the device is not customizable at the moment. There are some discussions going on to provide more customization options but we cannot provide an exact ETA on when it will be rolled out.
Sorry for the delay in response but I just got the message from the appropriate team. It seems that all of those requirements cannot be realised at the moment but there are some works going around that unfortunately with no dates around that as not many people requested something like that. In order to increase the probability of having that feature I highly encourage you to place product feedback via our product form here: