The last hockey game at the Target Center was a regular season game between MN and UW in March of 2010...
For media types, the Target Center is just awful. The pressbox is tiny compared to the X. It's literally 1/8th the size. So I am guessing that they would need to make a special press area in the upper deck in order to accommodate the team reps and the media. I know that the MN radio broadcast was from a table at the top of the lower section during that game, whereas they would usually have their own room at the X.
For the fans though... I don't really think it will be that bad. Sure it won't have the comforts of the X, but the location should more than make up for that.