Is this a newly built LR and not earlier '19 or late '18?
I did hear that they are discontinuing the 14-50 as standard (this was mentioned by some online sources somewhere within the last month), but this is the first I've heard any mention of J1772 or floor mats.
I ask what the build date was because I just took delivery of a '18 Mid Range inventory vehicle, and the delivery/service center had it configured without floor mats. I pointed this out and my delivery guy acknowledged it, saying it was just a mistake b/c he assumed it was a SR+. He went back and pulled out a pack of floor mats and installed them. I also specifically asked about the 14-50 adapter, and we did confirm my car came with it (as it should have, it was built in '18 when it was standard). He confirmed Tesla is (or is planning to) discontinue including them, but this particular service center was making sure to include them from their own inventory, when possible, for the time being.
So there may be some truth to what your assistant said, but I wouldn't believe all of it. Floor mats should def. be included. Haven't heard anything about the J1772 being discontinued.