I have to agree with you concerning the sounds of the E80/G70 and their usefulness. Many have criticized (perhaps rightly in some cases) some of the sounds that Roland are using in their current arranger line, but always in the context of soloed sounds. But..... these same sounds, in the styles, work just fine.
This has always been Roland's strength - the realization that, for a sound to work IN CONTEXT with other sounds, it has to give up some of the qualities that make it stand out as a good soloed voice. Anyone that has mixed sound for a live band, or mixed a large multitrack project together has learned that for many things to sit together in a mix, they can't ALL be big and bold and powerful. EQ has to be applied to one sound to 'sculpt' out enough room for another sound to sit correctly.
The end result is, if you listen to each track soloed with the mix EQ and effects on, you often go 'this doesn't sound right', but when you hear it IN THE MIX, it sounds perfect.
We should all spend more time deciding if an arranger's soundset is good or not by hearing the sound in a style, not soloed. After all, that is how we are going to use it 95% of the time.......
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An arranger is just a tool. What matters is what you build with it..!