This is a great list! I don't think I will comment on every single item here - some of these will take a while before I will be able to get to them.
A couple of them are handled for the next beta - I've added a "cap ends" option to loft and sweep (there is one for Extrude already), and I should be starting in on image backgrounds soon, I'm hoping to start with that later today.
- Michael
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