As you mentioned, yes Dollhouse is referencing Battlestar Galactica as one of many references.
First Joss Whedon is a huge fan of the Battlestar Galactica Re-imaged Series, he almost was involved in it!
You’re clearly a huge fan of BSG [BATTLESTAR GALACTICA]. Have you
talked to the creators? Yeah, Ron [Ronald D. Moore] and I during the
writer’s strike spent some time together on the picket lines. I try
not to be too embarrassing though.
Must be a nice pat on the back for them to know what a fan you are of
the show? Well I’m not the only one, but yeah I’m pretty passionate
about the show. I stole Tahmoh [Penikett] and I’ll steal again!
There are some out of universe connections most notably Consulting Producer and writer Jane Espenson, who wrote a few Battlestar Galctica episodes and was given producer credits on later seasons.
There are also Battlestar Galactica directors Rob Hardy, Allen Kroeker, and Marita Grabiak.
And prominent Battlestar Galactica actors Micheal Hogan, Tahmoh Penikett, Mark Sheppard, Dollhouse special guest stars like Jamie Bamber.
Along with some story allusions/references
The Hollow Man - Allusion
Aside from "The Dark Phoenix Saga," Mellie's story was also influenced
by Whedon's professed love of Battlestar Galactica, wherein a Cylon
had fallen in love with a human and had to choose between what she
knew to be the truth (that she was a machine) and what she felt to be
real (that she was a human being).
Ghost - Reference
Gabriel refers to Edward James Olmos, an American actor and director
best known for his role in the remake of Battlestar Galactica TV
series. Joss Whedon is apparently a big fan and Tahmoh Penikett
appeared in the show as a series regular.