I didn’t like that R2D2 was powered down because he was depressed about Luke going into exile…then wakes up suddenly for no apparent reason…

If they wanted a dramatic emotional push to his part in the story then they could have said R2 was severely damaged on a mission and since he is over 50 years old (he was Padme’s droid 20 years before Leia) those parts are impossible to get for his series of astromech. But since he has such sentimental value to Leia she couldn’t just get rid of him so they put a tarp over him until they can figure out how to fix him if its possible. That was over 30 years ago. All of this explained by C3PO. Then we see BB-8 go over to him and is blown away because this is R2D2! THE R2D2 who helped take down TWO Death Stars and saved Princess, now General Leia’s life on many occasions. This guy is a LEGEND among droids particularly the astromechs. This is his freakin hero and he has GOT to fix this dude! He makes an attempt then blips and bloops at him and nothing happens but a lone blinking light…sad, BB-8 rolls away and we cut to the rest of the flick, Han dies, the Death Star implodes and back at home base R2 comes back online! Turns out he has the map of the jedi temples from the last time he was on the Death Star and BB-8 has the missing piece and YAY!! We can find Luke now!