There is one more thing to consider: It's extra value from R2-D6, but sacrificing that particular droid also means sacrificing the Elite Talent equipped on top.
Therefore, you probably want to use an Elite Talent that isn't as necessary in the end-game than the early- to mid-game, even one that's sacrificial in its own right.
So do you lise the EPT when you lose the astro? I have not found the clarification to this question. Or is it in the new FAQ and i have overlooked it?
They sadly don't clarify cards that aren't released yet.