I was just browing mods I follow on Skyrim Nexus and this is one that only crossed my play recently and should have been there from the start.

Timing is Everything: http://www.nexusmods.com/skyrim/mods/38151/?

It lets you define after how many days the dragons/vampires start attacking and other quests start like Hearthfires. Everything is like it should be, just after you warned the Jarl and returned the Dragonstone tablet, Whiterun will NOT be immediately attacked by dragons to continue with the main story. You can postpone the letter from the Jarl of Falkreath to start Hearthfires indefinitely.

Playing this game, I could imagine many many times to postpone the next MinuteMan mission or postpone the arrival of the Brotherhood of Steel a little and not immediately after you killed Kellogg. Or you could pospone the whole detective stories?

Just some thinking of a great mod, which hopefully makes it into Fallout4

p.s. freedom for the questlog!