That would not be an interface thing, well, not a game-interface. It would be a testing interface. Maybe a separate window that collates all the instructions and attempts to make them legible. The detail portrayed by something like that would be inappropriate in most finished games.
Working regularly on the interface would be impractical. Things would change, overhauls would be required, and a lot of work would be wasted. One alternative would be to get the interface refined early and make sure that everything added conformed to it, which isn't fun and can end up with an ill-suited interface, because at this point we still don't know what the finished product would be like. For example, we still have no idea how abstracted battles between settlements is likely to be. Will the whole world be modelled at once? Will the lands around armies be modelled as they move? Will you send off a bunch of soldiers and receive a battle report later? Will you just make donations to your civilisation and have them become more or less dominant based upon your donations? These would all require very different things from the interface and some would be inappropriate for the current interface. As it is, the interface trundles along with various features being catered to as they occur. It produces a very messy interface, but it adapts easily with the game rather than expecting the game to conform to it. At some later date, once the game is clearly defined, an interface overhaul would be appropriate, but at present it seems that short of getting more people playing the game in its current state, focusing on the interface in inappropriate. I will admit however that the interface will tend to get very messy as long as it is updated to match individual changes in the game, and could become very nearly unplayable if no attention at all is paid to the interface as a distinct entity.