*Will contain obvious spoilers!*

Hello,

I resumed playing Skyrim with my character who was somewhere in the middle of the Dark Brotherhood questline. More specifically I had killed the Emperor's cousin et had to go back to Astrid.

Following in the cousin's demise was Commander Maro's son, and things soon started to go wrong.

Astrid told me to go and speak with Gabriella. But the lady had nothing to say to me. Leaving the Sanctuaty, Leaving the game, reloading, nothing did the trick.
I finally decided to abandon and on my way back to the exit, Astrid suddenly had something new to say to me which finally unlocked Gabriella's dialogue please note that at this point I had already saw Astrid on the way outside multiple times. It just unlocked itself with no real reasons, just like that.

Anyway, I could go after commander Maro's son, stalk him, kill him in a city as I was instructed to do, plant the letter, go back to Gabriella and get my reward.
She then mentionned there had been an incident with Cicero and instructed me to meet with everyone in the main room.

So I go to the main "room", see everyone was gathering here aaaaand... nothing.
Went back to the Sanctuary entrance, then back again to the meeting, which started the script, got the dialogue, went to CIcero's room ( he was still there, by the way, which is funny since I was told he fled ), took the journal after reading it, went back to Astrid, witnessed Shadowmere appearance, fast travelled to Dawnstar, reached the DS sanctuary door, talked with Arnbjorg, went to the gate knowing the password and... Surprise! I didn't have the right option to open the door.
Here again I went back, waited, reloaded, zoned in a building/waited 24h/zoned out and back to the gate, reloaded during Maro's son mission... The damn dialogue never gave me the choice to put the right answer.
In the end, I summoned the console, found the gates's ( the talking gate and the actual teleporting gate ) IDs, disabled the Talking one, enabled the teleporting one, advanced the quest one step, and I was able to do the mini dungeon and find Cicero.

Went back to Astrid, lied to her abou the fact I spared Cicero, and got the Gourmet mission. This one, surpsingly, went perfectly well. I could hid the body allright, and all was good.

Now the "To Kill an Empire" mission.
if was going smoothly up to the point Giana left the kitchen to go and feed the Emperor.
She actually stood there, right before the locked door, told me to wait while she was serving the food.

And she went back to the kitchen right away, without unlocking the door or doing anything.

Agaaaain, reloaded/left/reloaded an older savegame... Nothing. Finally decided to unlock the door with a console command, kill the emperor mano a mano ( he didn't like the taste of a good ol' daedric axe :/ Also, he was alone, no guests... ), proceeded to the escape door, and the ambush wasn't there. That's right, no guards, no Commander Maro, no one. I just crossed the bridge peacefully, was instructed to go back to the Sanctuary.
Tired, I just left the game here.



SO!
My problem is that it would seem half the scripts of the game are simply refusing to start and/or execute correctly.
This is becoming quite frustrating : the whole questline was really brilliant, and then all of a sudden it's plagued with those bugs.
Is there anything, any console commandes, any program, anything at all I could do to force the game to regenerate, renew, or something, the scripts? How could I debug my quests without the need to summon the console every 5 minutes?

Mod wise, I essentially have texture mods and the latest ENB.
I installed Better Whiterun and a few new weapon mods ( dragonbone collection, Jaysus swords ) as well as Bandolier, in regards to content mods.
Hypothermia , Total Realism, and SkyTEST are the "script mods" I have.
Unofficial Skyrim Patch is in there too.
My saves grew very big, sadly. autosaves ( on travel only ) and quicksaves are 110mb+ and regular saves are around 80mb.

I reaaally don't want to start anew, not at this point. I can easily ditch the three of my "script mods" as I don't really use them. ( getting cold in Skyrim was just obvious to me, but, hey...that's not so bad. )

Anyone have a tip?

Thanks,
-W