D&D 5E First Strike: Initiative in Next

[Chris_Nightwing]

Would you say that the system I linked to earlier has this characteristic? It is group initiative in practice, albeit with individual rolls for the PCs.

I think you've got a couple of good ideas there. I particularly like the idea of a monster having (effectively) a fixed initiative, with players going before or after depending on their rolls. I also think that having certain effects resolve for all players all at once has potential.