My Group initially did not use Hero Points for reviving as we wanted to test out the rules for death, dying and Treat Wounds. As we gained levels in Doomsday Dawn I treated the sessions as I would a normal session for my group and allowed Hero Points to transfer from session to session, which lead to accumulating enough points to use the 2 point Reroll a dice and 3 point Extra action. Both options made the game more fun, helped out players that were rolling bad that night, and made pivotal moments seem more epic. Also there seemed to be enough healing options, a mundane and magical route, to forego needing an extra revive.
As we made it to the 5th Chapter we finally had characters dropping on a regular basis and encountered the whack-a-mole problem with characters dying and using 1 Hero Point to revive multiple times in the session. It was more comical than heroic and seemed to take the threat of dying away from what promised to be a rather climatic chapter.
What does everyone think of our idea to limit the 1 Hero Point revive to 1 use per session? And allowing Hero Points to transfer over to sessions, allowing enough Hero Points to be saved up and used for Rerolls and Extra actions? It didn't seem to have much effect on making the battles easier or harder as most of the points were used on Boss battles which were fairly tough in their own right but maybe someone has had a different experience.