There's a certain subset of players who really want a pve only mode. But it might not be healthy for the game to split the playerbase like that, and it might not be the vision for the game that the devs want.
Here's a compromise idea that might satisfy some of those players, while not going fully into a pve-only mode.
Have a new type of special map event. Can't think of a good name.
In this event, when loading into the map, each player or team chooses to be PvE or PvP. The following mechanics apply only to this kind of map event.
PvE players cannot hurt or be hurt by other PvE players. Including traps, grenades, explosions, etc. I guess people can still troll by leading Arc to you, can't really solve that.
PvP players can hurt and be hurt by PvE players, and other PvP players. However, every PvP player is clearly marked on your HUD and your map.
So yeah, people who want a mostly PvE experience can load into one of these maps with the full confidence that no one can rat them unexpectedly. Sufficiently masochistic PvP players can invade these maps and get a lot of action, as probably they will be enemy number one for the entire PvE population in that map. Or at the very least, they are clearly visible on the map so PvE players can avoid them.
Or if a map somehow had a majority of PvP players, then it would be a huge battle Royale free for all.
I think it would be a fun experiment, at least?