The fittings on my 2011 327 aren't leaking but I recently had some discussions with a Lippert repair center technician about the condition of the hose fittings. THe hydraulic distribution block is an aluminum casting and doesn't rust. The hose fittings are steel and subject to rusting. All of my hose fittings are badly rusted after just over two years of use.
Lippert initially offered to replace the fittings but when the tech examined them, he discovered that the hoses were not Lippert but were ones probably manufactured by Forest River. They were afraid that if they tried to open up the hose fittings, they wouldn't be able to reseal them and might have to put new fittings on the hoses, a potential disaster if their fittings wouldn't fit on the hoses or the hoses became too short after cutting off the original fittings.
I suspect that when your motor was changed, the hoses were disconnected and you now have leaks from the fittings. I'd go back to the shop that did the motor replacement and find out if they removed then reattached the hoses. If they did, then they should be responsible for fixing the leaks.