Subtasks usability question on Agile Board

Today I noticed that subtasks are not represented as standalone cards on Kanban board. They are tied to parent card and displayed and numbered list.

What are confusing:
1. In the list you don't even have task IDs.
2. You need to double-click on subtask to open it. Why not just plain simple links underlined by rollover?
3. When parent task is large enough that it takes more than 1 sprint to complete you can't see the progress because you don't have cards for subtasks.
4. You don't see which subtasks are resolved.

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