Safer? Well yes. Runway incursions should decrease as does the chance of collision on the taxiway (which has happened at BK on multiple occasions).
What I do agree with is that there should be taxiway markings, that there is still confusion from some pilots which is fair enough too.
The new procedures can't handle the amount of traffic that used to move with GAAP, so if 20+ aircraft try to taxi at the same time like yesterday including half a dozen or so IFR (some who didn't have the BK4 SID which made the blockage worse) things are going to slow down.
One thing that has also been mentioned is the fact that people at the back of the queue were trying to talk over those calling at the front of the queue. Hopefully in the near future it will be documented a little better on taxi calls to ensure some kind of order is maintained ie calling when number 1 holding short of the manoeuvering area, just like you would at the holding point for a runway.