There's an English guy named Richard, on the Danish G70 forum, who has written an amazing piece of software to help with batch programming Roland UPGs and UPSs.
I admit that the controls don't always do what you would prefer (but Roland guys will say that about Korg's, and Ketron guys will say that about Yamaha, yada, yada, yada), but it is possible to program the registration to do what you want.
Of course, for guys with huge songlists have a herculean task programming all the registrations. Richard's software (called the G70 Session Manager) allows you to select as many registrations (UPGs) and batch apply destinations for controllers, keyboard modes, reprogram OTSs, re-order Set Lists, many, many things that are tedious to do one at a time.
It is truly revolutionary for the G70. We have quite a few E60/50 members, now, and perhaps he could be persuaded (he charges a nominal fee for the full program, but it is functional without the extras) to reprogram it for the E60/50.
Give it a try......
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An arranger is just a tool. What matters is what you build with it..!