totally agree. And considering that we have instant communication it's not hard for your "scout" to take a screenshot, upload to tinypic and link you. It might take a whole 2 minutes.
I say NAY to the idea of seeing what your "scouts" see.
When you have to organize a whole war campaign for a faction, you will think differently. Most of the times working with people in Strat is like herding a bag of fleas and to get them to send a screenshot from a specific location in a defined time frame rather difficult.
-buying 5 keys
-assign them as scouts
-sending them to all corners of the map
-who are these guys? I do not know them * poker face *
try use TS, screenshoots, teamviewer or Advanced Tactical Center
All you would see is the area in a few circles in the 5 (??) corners of the map, not everything on their way (unless you watch them the whole time). Having multiple keys is bannable in Strat, but assigning the job to clan members would give more of them a purpose. Good suggestion about ATC though!
I am not suggesting to make it ridiculously easy to see the whole map, but in order to be able to plan you need some kind of visual intelligence.
Also don't disregard the additional diplomatic options and reasons for clans to work together thus would provide.