One thing I dislike about many Aikido or JJJ schools is so many student focus on forcing a wrist lock when an opponent resists. We train with full resistance so forcing one lock is not going to work especially if the other person knows how the lock is done. We also train Newaza (Ground or BJJ to other folks), clinch/Judo as well as striking. One thing we try to do is have at least 3 main submissions from top, guard, side control, etc. Techniques that we feel works for us and we constantly drill and then practice against resistance. I remember training with a blue belt and as uke I was passively resisting and letting him do the technique. Next day he started getting a little too cocky when doing technique with a white belt and when I trained with him again I took resistance up a notch and stuffed his technique. I then explained to him that it's different when someone actively resists and knows the technique hence why I told him it would be necessary know to learn how to adapt and flow into a different technique or find a way to neutralize their strength (knee to groin, etc). Wrists locks aren't useless as I've heard from some people and come by done effectively when grappling or when having to cuff a person.