Maybe I'm wrong but it seems that "Depths of Depravity" is not compatible with FPGE. In fact, after the second battle for Hoover Dam, Charlie disappears forever and trying to "moveto" her to player leads to nothing.(*) In the meantime her quest about headhunting is still running and working (with rewards even if Charlie is not present) as the safehouse is still in place and accessible. The killers sent by Burke disappeared too.
*) I just discovered that I can use the console to "enable" her again, so then she is available as companion. Of course she has none of dialogue about a free and indipendente New Vegas or anything that involves a "post end" game.
In fact, after the second battle for Hoover Dam, Charlie disappears forever and trying to "moveto" her to player leads to nothing.(*)
In the meantime her quest about headhunting is still running and working (with rewards even if Charlie is not present) as the safehouse is still in place and accessible.
The killers sent by Burke disappeared too.
*) I just discovered that I can use the console to "enable" her again, so then she is available as companion. Of course she has none of dialogue about a free and indipendente New Vegas or anything that involves a "post end" game.