Sounds like a similar situation to Radar in the Tower, which is a procedure now in use at a few UK airports. At the college we were taught that you can NEVER use the ATM as a Radar while in the tower or the universe would explode. Now, thanks to a "Risk Assessment" it's deemed fine. So we now have the situation where a single Tower controller is covering 3 positions during the night, the usual TWR/GMC things, vectoring on the ATM, dealing with WIP on the airfield, Weather Observing, answering the Assistants Phone and whatever else needs done. Individuals have voiced concerns but it falls on deaf ears. All about the money these days tbh, and it's going to take a serious incident before the people running the show (most of whom have never worked traffic in their life these days) wake up to the situation.