The issue I have with most submissions is the level of investment they require in order to obtain the tap. Of course there are some that work with a small level of investment, but most require dominance or control in order to get the tap. In addition, the reliance on pain as a compliance factor which may or may not work.
IMO, it is PRIMARY to have dominance and/or control of the fight, so in a reality, I am looking for other things other than a submission. Dominance and control lead to hand cuffs or other types of immobilization. Other than that...chokes work. I have found no one that cannot be choked. Again though, the dilemma is the level of investment a choke requires.
Not saying these are not good things to explore...just that submissions and chokes and pain compliance are SECONDARY to control.
FWIW, I am a BJJ Brown Belt and teach Military Combatives...so that is where i am coming from as far as perspective as well.
I like you comments about the dominance and chokes. I'm trying to practice chokes as often as possible even if most of aikidoka hate it. In the context of aikido however, not all chokes can be useful, as we want to preserve the mobility of Nage. So I prefer standing or kneeling chokes, where I can move fast in case of other attackers suddenly appear.
I think many aiki bunnies don't accept word ‘dominance' in aikido context; however from purely technical point of view you are completely right. No pin, choke or submission is possible without dominance on psychological and/or physical level.