I wish they had played more of everyone thinking Liz was losing her mind (a la Shadybrook). It's natural for her and the people around her to think she would break down with the stress she is under. It's unnatural to ignore it.
How great it would have been to continue the s/l of hearing Jake's voice, thinking she saw him, etc... leading up to discovering Joss's bloodtype and knowing without a doubt that Jake could not be a donor match for Joss. Proving her intuition was right and validating her mother instincts. It would strengthen her character and give her back her old fight (something she desperately needs as opposed to the clinging she is forced to do). Poor Liz. It was a great opportunity for character redemption... completely missed.