: The first two might have been too slow but the third one makes EVERYTHING
: work, including Halo 4.

: Had Silentium come out before Halo 4, I feel a lot of the story driven fans
: would not have been as displeased with the campaign and terminals.

Some, sure, a lot... possibly, but not most, I think, since there's a general agreement story points important to the game should be presented in the game, and 343i said you wouldn't have to read the books to understand the game. There's also the consideration that revenge and "because he/she was crazy" are some of the lamest, laziest motivations there are, and combining them doesn't really make a better motivation.
BTW, is there anything yet that says how the Didact's magic/Force powers/telekinesis/whatever worked, or even what it was? I can theorize (well really "gravity manipulation" is the entirety of my theory), but I find it weird and annoying they didn't try to explain it or even state the explanation was unknown in the game.