Question: Can monsters carry more than one sample token at a time? If so, can they drop off more than one at a time on an altar?
If they can drop all their sample tokens off at once, this makes objective 1A in Blood Ties (scenario 3) impossible for the investigators to win, as the Keeper reveals the objective when two sample tokens are dropped at the altar, then wins when a third is dropped off.
Even if they have to drop them off once per turn, this means the investigators only get one turn to win, between when the second and third sample tokens are dropped off. Makes for a rather abrupt and unsatisfying ending.