I don't understand why Aikido likes to control the wrist. This will give too much space between you and your opponent. SC, Judo, wrestling all like to control the elbow, shoulder, neck, head, spine, waist, knee, ankle, ...
I also don't understand why Aikido does not integrate "leg skill" into their system. If you allow your opponent's leg/legs to be free, your opponent can move around more than you may like.
Leg skills are front cut, slant cut, inner hook, outer hook, sickle hook, leg break, horseback kick, leg lift, leg twist, outer leg twist, spring, shin bite, sweep, scoop, sticky lift, knee lift, leg seize, ...