pfSense

It would be nice to have a timeout when you applied changes to make it possible to revert changes back if no cofirmation made within configured time;

So user won't be able to ruin everything (like I did few times) by doing big changes ... if changes will break something and user will not able to access the router, user will not be worried and he will just wait for changes to revert;

I believe it's not serious to not to have such feature for serious project like pfSense. A real "must have" feature;