Has anyone experienced any problem with the 2018 Rouge transmission or any electrical problems?
You might get very limited response to that question if any at all. Have you taken this to the dealer under warranty and what have they said . If your current dealer is of no help then you can use another . Also in your manual you will find contact info to elevate the problems to Nissan corporate.
You also might search for Nissan Rouge specific forums.
Nissans are notorious for automatic transmission problems but as @VOLVO_V70 says, your warranty is your best defense. Take it to the Nissan dealer and have the issues addressed.
If this vehicule is equipped with a CVT transmission you need to take it to the dealer.Nissan has problem with them.