Yes, I thought about that but then we are getting closer to an built-in map editor. I have n problem with it, I think it would be cool, but would Mojang? I really would love to see this implemented. McEdit schematics sound interesting too, but again would Mojang implement something like that. Also for the /pos1 and /pos2 thing, a /pos1 @h for @here would allow for easier uses outside of the command block.
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Paranoid means safer. Not safe, safer. Remember, I'm still out there...
well pistons kinda eliminate this need but it can help for spawning things for like map creators but giving it a block id it would be possible to spawn mobs, redstone, anything it can spawn a whole contraption just with alot of code.
Working on another project, and came across a question relevant here. Can non opped players use command blocks. About the comment on trying to lag out a server, if a non-opped person can't access this it wont be much of a problem. You should already be trusting the ops (Either that or they paid you).
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Paranoid means safer. Not safe, safer. Remember, I'm still out there...
Place Block Command