Agreed, it was my most fun game of the year so far. A lot of fun to 100% on Xbone. It was pretty easy once the upgrades started rolling in and you could stunlock mobs or just go into super-execution mode if you needed to recover, but still a lot of fun getting up to that point. The only thing I was disappointed in was the boss fights.
As for people complaining about the label "free content", well some people are just never happy no matter what they get. If the entire game was free they'd still complain about it.