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On the six laning of Route 65 -- there is concrete barrier being installed in the median to divide NB from SB

There is a curve on that job where the median is wide and the top of barrier on the high side of super was up to 3 ft more than the top on low side

We asked bridge office about this and they had a retaining wall/stepped barrier designed by the consultant
 
The contractor has poured the high side retaining  wall portion of this median barrier and they are now trying to slip form in the half on the low side --( there is a base that was poured with the high part already for it to set on)

The contractor is having trouble with the slip form machine kicking out at the top potion as they pour this front face .   They are ending up with an approx  2 inch gap  behind the barrier at the top-- looks flush at the bottom
 
the contractor wants to fill this gap with expansion grout -- which construction thinks would be ok .  

The question is :    if the face of the barrier ends up more vertical -- by approx 2 inches,  than standard ,  is that a problem from the crash/safety standpoint?

I don't believe this is a problem since the more vertical a face is, the safer it usually is.  I am concerned about the fact that this is not how this particular barrier was tested.