It is - the gates are slower and has a bit of a waiting period - not long, but magnified when it is alternating traffic on either side. Plus you still have to deal with the human part of the equation - negotiating who to go first; plus what happens if someone else decided to follow that first individual through. That means even though you are second, you'd have to look for a different faregate to enter/exit from. It's wasted time due to the lack of predictability that the system should offer.
Honestly, as a transit operator they shouldn't have to be told to look into this.
AoD