Character Creation/ Bloodline creation
There are obviously lots of variations (between the odd 12 or so) Hunters I've seen.
Surely it's possible to implement these into a more fully fledged Character Creation, allowing you to Live Out the entirety of your Bloodline(As a family tree style gimmick). Each subsequent Death is a relative of your Bloodline/Family tree.
This would allow you to immerse yourself even further when you're creating a Bloodline to resemble yourself.
Maybe even the implementation of Mentoring? Picking a higher tiered hunter to "Mentor" your Bloodline (Obviously paying to use him) and 50% of the exp could go toward your Bloodlines most recent Hunter as you complete missions with the Mentor.
Obviously Death would lead to NO EXP gain, because a dead man can tell no tales.