Diki , I have found the "limited" edits on Roland arrangers more than enough..What else[worthwhile ] do you need to edit?
I have literally never been disappointed , finding a sound I need on any arranger from Roland, at least going back to the G800, that would include my RA800, E-600, VA7,EXR5[briefly], G600, G1000, and G70..heck even my E66, RA95 and RA90 had enough edits for sounds..
I didn't find any additional, real edit value[for me] on my Fantom, XP80, or JV1000 either..and my Triton Studio 76, was a joke..[I know why they call them workstations

]
I will stay with the limited edits capable Roland arrangers..
BTW:, I am enjoying the new sequencer design of the G70...and I really liked the G1000 sequencer (used it over the PC]..but the G70 sequencer will make me forget about the G1000 sequencer..

..Except for the dang "Chord sequencer"..
