Bloodlust tier 1 should be instant
When chasing the obsession, the killer should get instant tier 1 blood lust, this is to mainly help a lot of weak m1 killers, or even run a perk that does this in general so neod without the exposed.
Thincking being the obsession be more meaningful, I'd give the obsession 1.5x more blood points, and gives killers a chance against strong loops, or survivor sided maps a chance to get a hook, other benefit is killers who don't take obessions perks doesn't make obsession meaningless ever.
The survivors would know who the obsession is so would body block or protect to help as they know there easyier prey.
And only have 1 obsession a game unless a perk deviates as such, or untill a obsession is killed then switch it off
May say this will lead to more tunnelling, but I don't see people not tunnelling without it ? If a killer wants to tunnel there guna tunnel no matter the perks, killers or system in play they don't wait for your consent unfortunately.