but how many arranger players need or even ever use "in depth" synth workstation features, editing, etc, etc,..? why pay for all that if your never ever going to use those features or easily do it on your DAW programs?
a' you can not eddit nor create new sounds for an your arranger on a DAW. You can only edit midi and audio... and trasfering up and down to the DAW is not really convenient
b' The biggest point of having a deep sound edditing engine is that it allows those users that want and will use it to create new sounds, and share them freely with the community. Making it a better place for everyone. So indirectly everyone bennefits from having those workstation features on an arranger.
On top of that there is those features that don´t have to do anything with edditing. For example having 8 or more sounds layered and split over the keyboard, and the freedom to do so as you wish, combined with the sliders this is a very powerfull feature.. which should which should be benneficial to all arranger players.
And then there is the advanced arp features )and user arps of the workstations, which also would be huge combined with an arranger.
Other features, like Montage´s integration with the prementioned DAW-Cubase would also be a huge thing for many, espescially since we are dependant on the DAW for edditing.
Its best to ask this question to people that own both a traditional workstation and an arranger, and ask them what features from the workstation would be welcome on the arranger.