Regarding the chord sequencer, for some reason Roland didn't put it on their latest arranger, the EA7, even though they have had it on previous models for many years, and pretty much invented it.
Korg has had it for a long time too, but they finally issued an update that lets you save a CS to Songbook. The new free styles they have released even have Chord Sequences associated with them from the factory, although of course you don't have to use them, and they can be overwritten, as can everything on Korg.
I'm hoping the new Yamaha will allow saving the CS to a memory.
It's a VERY useful function for live play, freeing up the left hand for easy use of the joystick and other functions.