To my mind I really don't see why the focus shouldn't be on both past and future. That's kind of been a motif of anniversaries past though with this milestone it's particularly important. Moffat shying away from that actually surprises me since the whole point of Silence in the Library was to tell us that the Doctor is an amazing man with an amazing life but it's what he's yet to do that will really impress us.
In retrospect making that claim was probably a mistake on Moffat's part. I loved his first season but beyond that his heart hasn't really seemed to be in it. I know RTD got alot of flack for doing finales which everyone ignores the following season but Moffat's just as guilty for doing massive time paradoxes/"The stars are going out". I can really respect his desire to shake things up (me and others were complaining about the repeated formula as early as mid-season 2) but in practice it comes off more as him desperately trying to make his creations the most important part of mythologies. Moffat's created one character who is now the Doctor's wife and another without whom the key events in all his past adventures would have fallen apart. At times it feels Moffat is far more invested in his own creations than the title character.
I do think there's something to be said for how the overall production has been handled. RTD had a power trio going on with Gardner and Colinson, resulting in a well oiled machine. Poor Moffat seems to have a different exec producer each season and from what little we've seen their emotional involvement with the show usually seems nil as they treat it as another step on the ladder of a BBC career. The guy seemingly has had to steer the ship himself without support or seemingly anyone to tell him maybe an idea isn't that great.