Holly zombie shooting has become more difficult

[VVinterI3orn]

I don't know if anyone else has noticed this but since the last 2 patches the mission in hollywood when you guard the graveyard from zombies has become MUCH more difficult. Before the patches I could do this mission no problem at all, but now even with celerity and headshots for every zombie I cannot beat this mission. I know for a fact it was about half as hard before, now it has become impossible. Anyone else having this problem?