Transatlantic cruises tend to be re-positioning cruises. The cruise companies are moving the ships to or from the European market at the beginning or end of the European cruising season. This usually means April, early May, late October or early November. These are also times when the Atlantic tends to be chilly and the seas rough. Sitting on a balcony is often not comfortable. When I have done a couple of transatlantic cruises. On one I did have a balcony but it was only useful the first and last couple of days.

Transatlantic cruises tend to be mostly child free and most cruise lines cap capacity at about 2/3rds of a normal cruise, so there are plenty of quiet indoor places with a view of the ocean that you can use for reading.