By Daniel Kline The cruise industry, including Royal Caribbean, Carnival, and Norwegian, may be facing some rough seas ahead. During the pandemic the major cruise lines slowed spending in any way they possibly could. Royal Caribbean International (RCL) – Get Royal Caribbean Group Report, for example, delayed amping any of its ships, even though a few had been scheduled for the procedure, which adds water slides and restaurants and includes other onboard improvements. The cruise line also slowed or stopped work on projects like its Nassau beach club and its deal to buy the Grand Lucayan Resort …