I don't eat seafood so I can't comment on the shrimp but yes, it's just a lobster tail on the plates.
In the lounge there is usually a pianist, or the strings quartet or the harpist. Never just a guitarist.
The cabin stewards do clean quite a few cabins so their responsibilities may have increased.
My dinner waiter was serving 22 seats but there was a 3rd waiter who moved around assisting where needed in our section.
I've been sailing on the QM2 for 4 years and don't remember any free gifts except for the sailaway bottle of Pol Acker in your cabin.
They still provide robes and slippers and of course the bedtime chocolates.

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