Profit before safety...depends.
IF the crew (pointy end or cabin) are unduly rushed in their respective duties all the time, due to changes, yes safety is compromised.
OTOH, if cockpit and cabin are interchanged on a regular basis, just why would this result in compromised safety? Pilots do their brief as required, same for the cabin. To intregrate the brief of cockpit and cabin all the time is a complete waste of time, in my opinion. As each work to their respective standard procedures, there is no need to constantly brief together.