Found it! Talk to Mastra Fiametta in the Trading Post and select her last dialog option "View ship information", to get the old Vessel dialog. Which, honestly, is a more intuitive place for it to be than the equipment window. Good change, in my opinion. It's where I'd go looking for it if I hadn't ingrained old habits.
My bad for not reading to the bottom of Fiametta's dialog box and not noticing she had a new option.
