To improve teamplay and improve roleplaying the respawning option should be removed from PVE (it's dabatble if it should be remove totaly or only from Advance or Elite PVE's).
This way the need for Sci and Eng healers in a team becomes more important to be able to achieve the PVE goal. Team play becames more important. And ther will be more gratitude towards each other like saying "thanks for the heal, I almost died" phrase will be seen more often etc.
It's a bid odd to die in a PVE but just be able to respawn after some seconds, like nothing has happend. When death is permanent in a PVE, people will have to take more care about each other, hence improving teamplay.