One of the things I like about aikido is everyone trains the same thing together from the start, no hidden secret techniques for once you are a black belt
That not to say there aren't things you don't see often, when was the last time you saw Ganseki Otoshi in a class (I know its been a while for me) For those who call it something different here's Saito doing it :
http://www.saitosensei.com/images/80_gonseki_paulh.jpg
Just you can practice basic, or make a "tricky" entry or heka waza, but its all the same techniques. As you say hopefully you just get better at them.