Thanks for this feedback and great to hear Copy/Cut/Paste is working well for you! Following up on your suggestions:
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Row movement (i.e. ability to drag rows to move them) is a core feature on our roadmap.
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We are planning to make the formula bar expandable, allowing you to see many lines at of formula text at once. As part of this we may consider tightening up the line spacing to achieve the effect you mentioned here.
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Regarding the motion of the formula calculation progress bar, this will be improved as part of a broader set of UI updates we have planned.