More realistic sim. When using PPE need to consider the time needed to don the equipment and the deficits which might be suffered to dexterity and communication through its usage. Some tasks become difficult when wearing PPE and the difficulties suffered are not intuitive prior to actually simming the scenarios with all stakeholders presence.
The one caveat is that as little PPE should be wasted during this process. In the lead up to Covid19 I witnessed criminal amounts of PPE being wasted during fit testing...