I don't think the screen angle should be a deal-breaker... FAR more important issues then that (IMO).
But it IS something to bring loudly to the manufacturer's attention, by any and all means, as it is a design feature that could be corrected easily on the NEXT model they make.
But they'll only do it if you tell them, often and loudly!
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An arranger is just a tool. What matters is what you build with it..!