Arcadia and QM2 are our favourite ships and their quality is similar. Both have alternative dining (at extra cost, both have good ballroom dancing (although ballroom is bigger on QM2. Entertainment better on Arcadia, lectures superior on QM2. Food good on both. Cabins are extremely comfortable and have everything you need, and I am sure you will have a great trip. I always take gin and champagne and have never had a problem.
If the transfer is not included in your booking, don't be persuaded to pre book a car through the ship. If I remember rightly they were charging £90 last time. We picked up a taxi very easily outside the terminal and paid $35 dollars (inc tip).
PS See you onboard.
Thank you for the brilliant answer that is very reassuring. Counting the days Jan and Ro.