I noticed that United made a flight change to an upcoming itinerary that moves my gate to gate transit time at EWR from 40min to 15min. I thought 40min was already tight but 15min seems highly unlikely. In fact, I didn't know such a short transfer was allowable and I'm surprised their change did not also result in a change to the connecting flight. There are a couple later flights with availability in case I can't make the connection and I'm debating to leave it as is and see what happens or to reduce the element of chance and ask United to move me to a later flight (current flight is 737-900, next two are both 757-200 fwiw). Which would you choose?