I use an FC-7 footpedal with my G70, usually with Auto-Fill ON, so hands free, I get where I want to go, but I confess that sometimes I want more choice of fills. As I play mostly LH bass and only use my arranger's drums, it's not quite so important that the fill match the variation level so accurately (but if you are using full arranger mode, it's more important that they match).

I have often wished that you could use a two-tap process if you wanted a fill to go to a variation it is not usually destined for; 1st tap (of button or FC-7) starts the fill of choice, with it's usual destination if not interrupted, but if you quickly hit a different button, that should change the destination variation, BUT NOT THE FILL......

I also wish that arranger manufacturers weren't so lazy in their choice of fills - in other words, why not have a dedicated fill for each and every variation destination, rather than the limited choice they now give you, This means (with four variations) 16 fills, if you count fills that return to the same variation, and 12 if not. There is no technical reason why they can't do this, just a desire to spare the style programming effort, I guess. Roland give you only seven fills, so you can see they are getting close, but stumbling before the finish line.........

Another area I would like to see improved is how arrangers deal with break/mutes, and especially how they deal with fills DURING breaks......... One of my beefs with the G70 is how they dropped the dedicated Break/Mute button in favor of (after many pleas to have the feature at all!) putting it away from the variation buttons with the Assignable switches. It needs to be right next to the Variation buttons, preferably where your RH or LH can get at it...... NOT way off to the LH end of the keyboard.

I would also like to see (maybe as an option, but it would be OK as the main behavior) that if you trigger a fill AFTER you have triggered a Break/Mute, ONLY the drums play the fill, just like what happens with a real drummer - when the band makes a stop, the drummer will often play a little 'pickup' at the end of the bar, to bring everyone in on time. Currently, you trigger the fill during the break, EVERYBODY jumps back in (at least on Rolands), ruining the effect.

So...... here's a few ideas for improving what we already have. Any suggestions or comments?
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An arranger is just a tool. What matters is what you build with it..!