Hi @gmesher, welcome to the Supernotes community!
As you’ve mentioned we try to keep things simple (and fast) we generally try to scope things down to a card level rather than a line level. That way you could assign a targeted date to that ‘task card’ and then link to that card.
Support for multiple dates & date ranges is something we’d like to add in the future – but it adds quite a lot of complexity. We’ll see what we can do. If anyone else would like this please like George’s post above so we can gauge interest.