I rewatched it again the other day and once again and, just like the first time I watched it, found myself bored by the half way point.
And thats a real shame, because theres so much action, and so much to like that its almost an impressive feat that they've managed to make it so incredibly dull. I'm not even sure what the problem is, but its not a problem of pacing; Mad Max was basically a continuous action scene and there wasn't a dull moment. But I think its because it just feels so incredibly pointless, you've seen this story before, you know Finn and Rey will survive the film and none of the action scenes (with the possible exception of the lightsaber fight at the end) feel like they're entertaining in their own right.
What makes it worse, is the first 10-15 minutes of the film are comfortably the most entertaining, it just feels right. The new characters all are introduced in a interesting way and it does an incredibly good job of setting out why you should care about them. Then Finn and Rey get on the Millennium Falcon and the film just turns to a mediocre re-hashing of a tired formula.