Me neither, Dennis. Yes, the action is quite a step down from the A70/G800/1000/70 one. But that action is pretty heavy... accounts for some of the flab on the G70! By its nature, a heavy action needs a stronger case to support it... Overall, I can live with the action. It has none of the springy sponginess that Yamaha PSR's have, is pretty crisp and comfortable. I just mainly have to get used to the keys being a bit shorter and more organ/synth like than piano sized and smoother. Not sure I could live with a PSR, but I can live with this.
If you are already a laptop kind of performer, then no, probably the BK isn't going to offer MUCH that outperforms the best VSTi's. But OTOH, there's bombproof operation and polyphony, and a very integrated soundset, which is always the weak part about using VSTi's.
Seems you already have a good workflow going, Dennis. If you are comfortable with the laptop/controller thing, I'm not sure how anything is going to better it for you. Some stuff might make it a bit easier, but at the cost of flexibility and a bit of sonic loss.
Now all I need is a Karma iPad app that allows instrument definitions from Roland to plug into the BK!
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An arranger is just a tool. What matters is what you build with it..!