It has the chord sequencer, but no EC5 socket. .
lack of connection of an EC5 is easy to be compensated with an external, extensively configurable controller (also with USB controller as Nanocontrol).
EC5 - only adjustable globally - I always considered to be a less valuable tool. Maybe most Pa3x-player use EC5 fixed to 4 Fill-Ins und Break, because switches of EC5 only are adjustable in globals, ie permanently. Same occurs with original pedal/footswitch without possibility to adjust them individual for performances / kbdSets.
There would be the best opportunity to use flexibility to design a variety of music areas. Split points, chord recognition and many other functions could be used individually in Korgs Pa-models per performance (kbd-set), sb-entry or even in STS.
Only to use important tools globally is not useful in my opinion.
If it is also a pity that these functions were not included in any update of the Pa3x, it is almost thoughtlessly to ignore that in current model series.
Even worse with the latest model Pa1000 with VP-Presets and style performances are banished to globals, instead of possibility to use them variable within the kbd Sets