There are definitely less activities on a very port intensive cruise so you might have found more to interest you with more sea days (or just more of the same stuff that didn't appeal to you!).
It's nice to see the difference in activities, food etc for Alaska.
It's great that others have had much more positive experiences in QG (including me) but this reviewer didn't and he is perfectly entitled to express his opinion.
Hopefully he will find a more satisfactory experience elsewhere.