Can't understand why you haven't had a response yet, so here goes.
My experience - not current, but worked NavCanada EFPS system including transition from paper strips to EFPS at large unit in UK - TWR only.
There was some reluctance to use new technology during training - not all from "senior" users. Were you were to suggest reversion to a paper system now, I don't think you'd get much support - from anyone! It's easy to use once familiar with the system.
Benefits.
You can now read my strips!
Logical strip movement of strips between windows (strip bays) and between work stations GMC - AIR etc
Strip marking and movement universal throughout unit
Automatic interface with other computer systems NAS (UK) - IFPS - AFTN - Slot Management - Stand Management etc
Every input to system is recorded, so tons of data available to ATC, Airlines, Airfield operators etc = income!
Staff costs!!
Disadvantages
Reduced staff numbers
Consideration must be given to high ambient light conditions
I would suggest that the benefits outweigh the disadvantages.
Perhaps someone will comment on a combined TWR and Approach system for you?
Hope that helps.