I found the correct analysis log. The healing done page can trap you.
http://worldoflogs.com/reports/rt-w3...2629&target=58
The raw healing done from Shield Guard is: 6,803,267
The raw absorb from barrier is: 11,829,207
The amount of block is: 8,848,693
Sum: 20,677,900
30% of that is: 6,203,370 ... that is actually pretty near to 6,8mil.
So the healing is good. What makes it bad is that 80% of that is currently overhealing.
BUT...if you are actually taking damage and need heal you can make use of that 80%!