I liked "Gary Unmarried." I wouldn't bump that show at all just to return "Rules of Engagement", when they could just take the place of Two & a half men. Besides , couldn't they just film some more "Big Bang Theory" episodes, so they could show them back to back .That show has become very popular and I am sure the public wouldn't mind them pumping out about 8 more this year to fill in the void created by "Two & a half men" taking an early hiatus.
According to reports either "Gary" or "Accidentally" will survive and it comes down to whether "Accidentally' can do better than "Gary " did in that time slot.