Technically we've already had non-SR reprints of Black/White cards, with Ultra Ball and the Kalos Starter Pawniard. ;p (And the various other obvious things like Switch and Potion that have been in every format since the beginning of time.)
I have no problem with reprints. But I do have a problem with them reprinting powerful cards for the sake of reprinting them, as was the case with the BW series shinies. Why should powerful cards be legal for an extra year or two than they'd otherwise be? That, as has been mentioned, defeats the purpose of a rotation in the first place, as we'd lose very few powerful cards. (We already saw how irrelevant the rotation to Next Destinies-on was. It got rid of almost nothing.) If a card has a valid reason for returning, I see no reason for it not to (I mean, things like Level Ball and Super Rod aren't really hurting the game), but reprinting power cards just for the sake of it is stupid, and damaging to the game.