There was a ~1GiB patch on release that contained the extra voice recordings, possibly some last minute fixes and I assume a bunch of backer rewards (pets etc)
On the subject of no reviews: iirc they did release press copies of Dragon Commander to the press before they stopped working on the game, resulting in lower scores than the game might otherwise have had, I don't think they wanted a repeat of that.
I'm expecting a bunch of the famous Youtubers to make reviews, istr Angry Joe, TB and some others were rather interested in the game but afaiu at least Angry Joe finishes games before he puts up reviews so it might be a while yet before a D:OS one shows up...
