Brave Given the position of the fan and the grills on the PS5, it is possible the face plates actually act as form of ducting for the exhaust heat. If your plate has anything like ridges or what have you that might block that it may be an issue.
The trick would be to see if the plates warm up or not over time when it’s in use. Anyone done the ‘look at a working PS5 through an IR camera’ thing yet?