Well, no news here... you've been on this tack since day 1

Personally, I think the lines are so blurred, it's pointless to call them one thing or another. For every one feature that ONLY a home user would use, there is at least one feature that appeals only to the pros.

The reason, though, that you don't see many pros using them compared to WS's (at least in North America, Europe it's a whole different ballgame) is that they simply aren't voiced well for the contemporary keyboard player (I'm talking those in their 20's and 30's) rather than any intrinsic difference. And that they are a LOT harder to find in a store (at least those above toy level) than WS's, for comparison purposes, and they come chock a block full of styles that no-one under forty really gives a damn about.

But if ALL you've got to point to arranger's undisputed status as a 'home' keyboard is ONE feature, well, I can point to a half dozen that say 'pro' loud and clear. Majority rules...
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An arranger is just a tool. What matters is what you build with it..!