Hi Anthony , i read your first posting and intended to reply , then i got side tracked and forgot, sorry about that !!
Lack of good modules that are easy and logical to use is a big problem !!

I have 2 midi accordions
an Elka 83 (which I've had 20 plus years and love !!) this is midied to the great Technics smac1200 and I do all my gigs with this instrument .
I also own a Kn7000 which is very good which is midied to my DA200 midi accordion , due to the design of the midi system on the DA200 it is difficult to control the KN7000

I've also got another expander (which i will not name on the internet !! ) but has a dreadful operating system that is not user friendly !!and third party styles are very very limited

I've just bought a T2 and due to the more advanced set up features on the Yamaha midies up perfectly with the DA200 concerto acoustic/midi accordion , I'm over the moon that it does just what I've always wanted to do with the DA200
Yamaha have a huge library of styles which is another important factor for me !!

i don't think we will see much new in the module market , due to small world wide sales , the concentration on development and R&D is with the mass market of keyboards !! . Any modules will be for a very small niche market !!
I was once told by someone from Technics that they did'nt see a future for modules dispite the wonderful smac1200 they produced .sales where low !!

As a midi accordionist I really do not want to gig with a keyboard !! an expander looks better at gigs !!
But the sounds from the Kn7000 and the T2 are wonderful !! so I've know changed my mind set !!on the use of a Keyboard !! on gigs !

Regards .to you all ....Happy New Year

Giovanni