If I was responsible for paying out personally for the costs of injuries incurred on the path, I wouldn't bother with chicanes but would remove the lights.
I think at the moment with coal-black peds using the studs to feel their way along the path, forcing everyone to cross paths repeatedly would present a high risk for collisions as riders would be focused on not crashing into the metalwork and even less likely to spot a black cat in a coal cellar.
Based on sitting watching the path last night, almost no riders were going significantly faster than they'd be going to negotiate chicanes anyway. I could easily imagine numerous collisions though - not a single rider was going slowly enough to avoid me if I'd stood in their path, (probably including everyone on CCE who commutes on this path - although I wasn't there for all of rush hour I suppose :-)
Removing the studs would force pedestrians (and cyclists) to use lights that enabled them to see by, and therefore eliminate the possibility of the collision in the OP.