A few Examples:
Rededge will tell you not only the usual rumors, if you have done the quests with Narlen before in Chapter 5 (who mentioned always Rededge as his companion and also set in his dialogfile the variable for Rededge to appear in Chapter 7 and speak with you). He also will tell you, whats about with the thievesguild in the situation the town is in Chapter 7. Only from him you can know, why the guild is so empty if you will go there to follow Sarevok and the empty guild becomes more logical in this way. (By the way: they have forgotten to remove Alatos in Chapter 7, which is irritating, cause he hasen't to say nothing at this time and some thieves, you might meet, will tell you, that he has hidden himself. I have scriptet in the Area that he has to destroy hisself in Chapter 7)
They have cut down the NEB.DLG, which has had too many triggers and actions (I have just deleted 29 empty actions and 19 empty response triggers). I think, this was good.
BUT: they have also cut the action (in the cutscene) and trigger (in Nebs dialogfile) for Neb to appear outside with you, so that he can escape too and say his evil last words to you before running away.
In the thought, that on the first he leads you outside and second you will meet him again in Athkatla and can kill him there, they have deleted two trigger and one action to many, that I will implement now again. Otherwise, this will be an "unfinished" escape with the unwished, but needed help of a child-murder and also become unlogical in BG2
In Candlekeep in the game without TotSC the watchers of the keep will catch you, if you come outside the building. In TotSC they have cut this in case of too many trigger set by Koveras and Rieltar. So far - so good.
BUT: they have now given Koveras the action to set the variable "Criminal","GLOBAL",1 and set a Spawn of a wachter in the fifth floor, if you have killed Rieltar. In this way you will be catched in the building before you can explore the fifth and sixth floor (in the sixth floor stands the Gatewarden, who will catch you too, and whoms dialog had been cutted to a very short file).
I have restored this whole scene with only one more Global variable (that, what was also cutted, but I needed for the real guilty of the mainchar) under using variables that were set and only change them - and - the deathvariable from Rieltar. Now for me the Area will set the so important Global variable "Criminal","GLOBAL",1, spawn the wachters, that will catch you upon this Global and I can explore the fifth and sixth floor and talk a few sentences with Ulraunt and Tethtoril in the sixth floor as it was mentioned (and played often by me) in BG1 without TotSC.
This all sound like little things, but... hm - I am a roleplayer (otherwise I would play other pc-games) and - well, it takes a lot of time to restore such things, I loved in BG1 without TotSC. And sometimes - well: a tension braker has to be done
You see - they have good reasons to cut so many things in the game, but - they often have cut a little too many and too rough
@Andyr special: If I would more know, in which way Tutu really work, I perhaps could help with the Chapter progessions, but I didn't know exactly enough, how Tutu work and where the game will read out, what has to be done. I have compared the CHPTXT.2DAs from BG1 and BG2 and found a few differences: in BG2 they all reference the approbiated MOS file in the first line. May be, the engine need this and have difficulties to find the right Chapterprogession without this, but I don't know, how Tutu manage the 2DAs. Take a look on them by yourself, it might help some people.