Variations? Is that what it was about the R2Q5?
I don't pay much attention to variations unless it's like drilled into my head by my friends I help collect who HAVE to have something.
I just bought 2 (possibly 3) R2Q5's because I really didn't need anymore.
I want a ton of Astromechs to fill my dioramas, but all different colored ones. I got like four R4M9's and three R3-T7's. I'd likely buy about 1 to 3 of any others they come out with, though I'm hoping that is like maybe 10 more variations of astrodroids including R5's.
On the Death Star in ANH, you saw a red, blue, and green R3 unit.
On Hoth there was a white with black head R4, and the Death StarII had an all-black one. (cone head)
R5D4 would be a popular resculpt, but so would an orange one from Mos Eisley, a black one from the Death Star II, an all red one from Yavin, and an all yellow one from the Queen's starship.
As for R2 units, a white/green R2-A6 would be nice, as would be a solid yellow one from Naboo.
So that's 12 astrodroids I want, not hoarding any particular type.
Give us 2 a year Hasbro, just like R4M9 and R3-T7 (and thanks for those!!!)