PowerCivil is a complete platform change. While that's not unheard of, the complexity of that change is NOT to be underestimated.
Both packages have things they do well as well as areas I find them lacking. For what it's worth, I find the road map presented on the 'desk side to be clearer than that offered by Bentlet. There were simply too many variations on the theme for my taste.
Addtionally, I found the interface for PC to be completely unfriendly. C3D is a mess from a UI standpoint, but PC is still feels like it's Unix ancestors. I also find it very survey/cogo oriented, a plus for some, a minus for those of us who are used to working in a LDT/C3D environment.
At the end of the day, you have to do what works for you and your firm. If one person is throwing the wrench, listen to why they want to go to PC, and research it. Don't let their misinformation or rumors about C3D muddy the water and vice versa.