I agree with you that the elevator idea is nice. Also, I think it could be come really messy unless you choose a specific period of time. For example, from 12 PM to 2 PM. Though there are three elevators still it is crowded, i think it would be a good idea to make a path in the upper floors of the SERC that connects to the Engineering building, similar to the path in the first floor. I believe this would reduce the crowd at the elevators. However, I do not think it would be done by the uni, since it would cost them a lot and there is no really direct benefit fro the uni, such as improving the quality of the study environment.