I've got a slickster that I run for low viz assignments. My regular kit is a JPC 2.0.
I run an SKD PIG Brig 3 mag chest rig without the harness so that I can "plus up" during motorcade movements or while in the vehicle. I can then detach it and put it in my low viz rifle bag for foot movements in urban environments and remain discreet. (Anyone who has half a brain will still notice I look larger than I should, even with larger shirts, but the average earth person who is oblivious doesn't notice)
The big plus for me is the elastic side cummerbund. I typically run two rifle mags plus one bang on my non shooting side, plus my radio with surveillance kit and a smoke on my shooting side. This plus two pistol mags and an additional rifle mag on my belt in addition to the one in rifle gives me pretty good capability for low viz stuff.
No personal use the VS LWPC, so I'll reserve comment.