When we are upgrading the protocol, it is advisable to stop every transaction to prevent a bug or missing transaction that might happen when we are upgrading it.
That was why they were disabling it, prevention is better than cure.
Nothing to panic, not unless it goes beyond on a given time. The purpose is really to prevent an incident like this, and its normal for the upgrade. Wait for the announcement from the team if the upgrade was successful and dont create the panic.
We should treat this update as regular maintenance to prevent a problem from happening when the users are using their platform.
A delay is also understandable since a protocol upgrade makes some changes in the system that might cause some sort of disruption.
There is nothing wrong with it, we need to calm down a little bit and chill out.