There really don't seem to be too many opinions in the middle of the road on Freestyle. Based on people I've interviewed, you either love it or hate it!! I would say (and this is anecdotal only; not a statistically valid survey), that older experienced cruisers do not like it; younger cruisers, those with kids, and those who enjoy more of a "resort" vacation love it.
Frankly, I adore Freestyle. The stories about long lines are interesting, since I've never seen them. I think it is the wave of the future, and apparently many of the cruise lines agree, since they are following NCL's lead to some extent.