Hey, thanks for asking
I like the idea because it seems like it might enrich the gameplay further. I freely confess that I have no experience on PVP servers, so I’m not sure how it will affect the balance there. What I like about the idea is its potential for RP and player-organized events.
As for the technical aspects of the idea, it doesn’t look practical. It would require storing the last 10 minutes of movement for every player that has been logged in within the last 10 minutes. Even if the server can handle storing that data and keeping it updated, without serious performance degradation, things get more complicated when you need to query that data. You need a way to filter out only those paths that intersect the location in which you’re interested.
To put things into perspective, remember that the thrall feeding mechanic was taken out of the game because it was taxing the servers. All it had to do was check for thralls in its radius periodically, check their inventory and place more food in their inventory if necessary. That ended up being too resource-intensive to keep in the game.
All in all, the idea seems like an interesting addition to gameplay, but most likely isn’t feasible.
I’ll end with my usual disclaimer: I don’t work for Funcom, I don’t have any experience with UE4 engine itself and I don’t have any experience modding Conan Exiles