Probably not the specifics, but more to do with some things that we currently do automatically on the current control system in response to things like smoke detection or system activation now require operator input in different panels as some key systems aren't integrated. Introduces the risk of operator missing a step and things going sideways, which is avoidable in cases where the SOP is to always do A, B, C, and it's things like opening/closing things, shutting off ventilation etc.
More of a difference in design and operating philosophy, but tend to forget that our systems are much more integrated and automatic compared to allies. Things still have manual, independent operation capability, but we then push it up into the main platform system as well so gives us the ability to automate functions and also more flexibility on where you can remotely activate it.
The Royal Navy also does some weird things like they won't activate clean agent fire suppression systems with people in the compartments and then have a minimum 24 hour until you can reenter, which defeats the purpose of using clean agent systems as they are selected to be safe for occupants in the compartment, and not like CO2 or steam smothering where the suppression system will kill people.
Possible to do some of these things later, but means a significant engineering change where you are integrating new systems into your platform control system which requires a fair bit of testing, so would have been a lot easier to do it at build.
edit: In a lot of cases, these functions are standard in buildings already under the National Fire Code and Building Code, so we weren't really innovating, just applying it to ships.