Don't forget, the D-Beam can also do a Bass and drums only mute...
So, if you need that, use the D-Beam. At the same time, you can cherry pick which ACC tracks you mute with the Track Mute button.
So you can have a choice of THREE different levels... Full style, maybe strip it down to Bass/Drums and rhythm instruments only, and just Bass and Drums.
Some Variation 4's get quite busy, these days, and it is cool to be able to mute out SOME of the extra stuff (maybe the brass or strings), but still have a high level of intensity for the rhythm section. Having TWO independent places you can mute stuff opens your possibilities quite a bit.
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An arranger is just a tool. What matters is what you build with it..!