It would be great to add the possibility to put an IT service in maintenance, thus automatically putting the hosts with the dependant triggers in maintenance.
At the moment, when we have a planned maintenance, the operators have to expand all the IT service, searching for the related hosts. For complex services, it can clearly be a source of errors, and consequently false positives. This can really be difficult due to hard and soft links between IT services.
In the future, as it will be possible to put triggers in maintenance, it would be nice to look up for all the triggers defining the availability of an IT service, instead of the hosts.