That is really looking impressive! I can't give you much help with the gauge board except to suggest that the port and starboard gauges might have been grouped separately. Here is the starting platform of a WWII-era destroyer (admittedly a much different beast than Titanic) and you can see the gauges, counters etc. are grouped port and starboard. I expect Bill will have some useful suggestions.
One other possible addition is the pair of winches thought to exist at the floor plate level. So as not to derail your thread I'll create a new topic to discuss these.