Actually, it's the same deal with the G70. MFX for realtime parts only. The FX for the song and style section is pretty decent, though, but send only, not insert.

There IS a workaround, though... you take the part you want MFX'd, run it out a separate out, back into the IFX (an independent full MFX block dedicated to the RCA ins) and Bob's yer' uncle!

You'll find these hardware routing restrictions apply to a LOT of arrangers, and even some WS's, as well. It's a drag, but not a deal-breaker, IMO

BTW, E80 DOES have two extra MFX FX blocks dedicated to Song and Style Parts. And an extra Master FX (EQ and 3-band comp) for independent compression of style and realtime Parts. Not too shabby... (for an arranger )
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An arranger is just a tool. What matters is what you build with it..!