Shore cord gets warm/hot!

Good morning just purchased a 2007 Winnebago-Itasca Sunova 35J and hit our first 2 camping trips with it while bringing it down from the dealer. The question i have is the unit has an Onan Marquise Gold 5500, 2 roof top HVAC's however the coach has a 30 amp cord. I was concerned when i purchased it b/c i thought it would have a 50 amp cord. The tech that did the walk thru explained to me that it has a 30 amp power cord and an EMS shedding system. I checked the owners manual and he was correct however the cord gets a good temp on it and i was concerned there may be an issue. According to the EMS board i am only drawing 23 amp and that is below the allowable 80%. Do you think maybe i have a bad plug? i was thinking of cutting of the plug and installing a new one as the blades are discolored.

Any insight would be appreciated. I would have really thought this coach would have come with a 50 amp service.