The End of Time should have been a 1 parter and time of the doctor should have been a two parter. I think that would have made both stories infinitely better.
End of Time is full of padding and time of the doctor often feels rushed.
That’s why I made a fan edit of The End of Time, getting rid of all the unnecessary and weird stuff: no more magically resurrected (it’s left ambiguous), cannibal, flying Master, no more Wilfred magically finding the Doctor (the Doctor phones him in a scene I patched together), no more the Master copying himself into every human (now he just controls the minds of the people in the Mansion.) There are other edits too, in the end cutting 15 minutes for each episode: Part 1 goes from 60 minutes to 45 and Part 2 from 73 minutes to 58. A friend of mine who just started watching the show saw this version instead of the official one and she found nothing jarring within it, which was good news. I can make it available somehow if people ask for it.
Unfortunately, while In The End of Time you can cut stuff, you can’t add it to The Time of the Doctor. My desperate hope is that whenever Matt Smith comes back in a Special, in ten or twenty years, they will add scenes of him on Trenzalore. Why? Well, the best way to justify his age will be to pluck him out of his timeline while he was getting old at Trenzalore. It wouldn’t be difficult to justify that his absence didn’t make the Daleks destroy the planet, either (if there’s Time Travel involved, they can just take him back two seconds after he was gone; no fuss, no muss.) So they could add a few battle scenes and fans could add them to the original Time of the Doctor episode. But… I know how crazy that sounds. At best, it’s too far ahead to worry about it.
OMG, I would KILL to see your version of End of Time. It sounds amazing!