Nothing to add about the company but if I were redoing my hvac I would def go the 2 chiller route. Yeah, pulling the old freon lines out and running the coolant lines will be a pita, but I really think it will be worth it for long-term reliability and maintenance of the system.
The long runs of refrigeration lines in a marine environment full of vibrations and saltwater/air is just a recipe for problems imo. But at the time that's all they had really, so I don't blame any mfg for installing those types of systems, but given the current chiller technology I feel it's far superior from many aspects, reliability, ease of maintenance/repair, redundancy and power consumption/efficiency.