Even in the home, space can be at a premium. Why make anything bigger than it NEEDS to be?
About the only space saver I am not that keen on is taking a keybed down the the bottom of the instrument, and moving the wheels or bend levers to ABOVE the bottom of the keyboard. I have played a few keyboards with this type of layout, and it never felt comfortable having to reach out that far just to get a quick bend or mod adjustment.
But there is a ton of room on the T5 76's layout to put that stupid USB port so that it didn't add another 4" or more to the width. There are times when you shouldn't really have to point out obvious stuff like this to a great corporation. They should care enough about YOU to figure it out for themselves.
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An arranger is just a tool. What matters is what you build with it..!