Okay so I re installed it paying close attention to Data sizes & took screenshots(Just because talk makes one curious lol). I also wanted to point out that it does install offline with proof.
Incorrect size before uninstall: [ Register or Signin to view external links. ]
Mounting:
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Contents of Image & Sizes:
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Step 1: Install Origin & let it update
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Step 2: Login while online to verify
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Step 3: CLOSE ORIGIN, THEN RUN AUTORUN FROM IMAGE AGAIN, IT WILL SAY INSTALL.
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Step 4: After Install Starts, go ahead and disconnect Internet (I just turned off my wifi)
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Step 5: Let it finish, if it goes back to 25% LET IT FINISH
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Step 6. After complete close Origin and reconnect Internet. Go to start it and let it get it's patches.
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Note: While it says "Processing Large File" You can disconnect from your internet again to test it, I did (Downloading part finishes pretty fast for apparent 10 GB).
After the install and patches, my playable game size was only 2.71 GB:
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Maybe it's smaller because it's only Limited Edition? I don't know, all I know is that according to my experience it installs the full game from the disc.