It's a terrible idea considering mounts are locked in such a limited resource - (rare S-rank marks).

Here's how you fix it:

1. Sync it within the radius of the hunt mark like a notorious monster. If the hunt is 50, turn everyone into level 45 or something.
2. Scale it. The more people in the area, the bulkier it is.

That should fix the god-awful hunt-sharing. Even if someone pulls it upon spawn, there should be enough time to get to it despite the godawful server transfer queues.

Probably never gonna change but that's my two cents on it anyway.