Yeah they failed to create the buzz and we all know the reasons
Also last season transfer window was very average for ManUtd and Rooney wanting out killed off anything remotely positive happening.
I think this time club are not even trying too hard, it's natural for all ManUtd fans to get excited about what Van Gaal offers to the team going by his track record, same for players who are very happy to spend most of the training with the ball.
Also last season most of the backroom staff left so there was some panic, this time when you read about the coaches Van Gaal hired it creates positive atmosphere. Also many wanted to see change in style of play which we might be seeing under Van Gaal who is not afraid to drop big name players.
Or maybe one simple reason, after the season we had, we are pleased very easily.