Yes, I think this series was really all about Grace even though she was not present for most of the series.
She appeared to three characters in total - Liv, Rich and Franky.
The matter of Grace's surname... I would take it symbolically but she is the daughter of David Blood who had been in the series since series 4.. I don't think they made Grace his daughter so that she could have the last name Blood to give some symbolic meaning to her death later on... I don't know, that's just my opinion.
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| In the dawn of my wake,
In the calm of my state.[x]
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