don't worry, we certainly don't expect everything to be said in one post
we expect a discussion which would clear the fog and bring out the important stuff
one way to get started with the plan is:
imagine the yocto, without any labels on the panel
now, imagine you're in the mood to make a bangin' beat/track together with some other gear
so you switch on the yocto - and what do you do?
i hope i explained it well enough
answering this, or just picking up this imaginary story and continueing it forward may give some answers about what features the sequencer should have and why
PS: a small clarification about individual accents: from the sequencer interface - surely it's possible, even multiple levels or a software accent knob, but this can only go out as MIDI
the 808/yocto cannot have individual accents due to the design of the circuit (that is, without modification)