I really enjoyed them, but they shouldn't re-do that sort of a spectacle too often. It was a big hurrah that celebrated the fiftieth anniversary, brought an end to the "Time War," arc and said goodbye to Matt Smith, whilst circumventing the regen limit. It was a story that needed to be big, but won't likely come around again any time soon.
Of the three, I think "Time..." was the weakest. Though I still enjoyed it a lot, I feel there were issues with pacing and the tone shifting back-and-forth a bit too much between serious drama and very light comedy.
I also think it would have made a much better conclusion to the entire "Time War" and "Crack" arcs if it turned out it was actually the Time Lords who blew up the TARDIS to create the cracks for them to escape through. I think that would have been smarter and made more sense than it just being Madame Kovarian's sect that somehow managed to pull it off. Its still not clear how Kovarian actually made the TARDIS explode, but it wouldn't be hard to say that the Time Lords had engineered the TARDIS to always explode at that point in time, because they'd already seen the future and knew it was needed. Heck, even have it be the Doctor who goes back in time and is responsible for his own TARDIS blowing up in order to save the Time Lords. That would have tied it together much neater, I think. Instead it almost came across as a throwaway line that didn't really explain anything.
Oh and I also didn't like that the Silence - as in the memory -sapping aliens - got written off as genetically engineered confessional priests, so you could forget what you'd confessed to them. Way to take a scary, mysterious alien force that had apparently ruled Earth since before we evolved and turn them into a pretty boring irrelevance.
I also thought there was a bit of a problem with the resolution. Apparently the Time Lords were trying to escape through the crack and were transmitting the question because they knew only the Doctor could answer it. It wasn't a secret code that unlocked the crack, but just a way of making sure they'd got the right universe to cross in to. But Clara's message to them has the same effect. They obviously realise they've got the right universe, as they go ahead and provide the new regeneration energy to the Doctor. They know he's there.
So why didn't they just break through the crack at that point?
I still enjoyed it for the most part, though.