1) The mod is constantly updated and improved but a real bigger release is not expected until IWD-in-EET (if that comes).
2) Tamoko is WiP, it has a small quest regarding Sarevoks's missing sword to fit into the gap between his death and when SoD starts. It will have NO romance, Tamoko's man was Sarevok, and she is not a very likable character you would romance - after all, she was the one to torture prisoners for Sarevok and help him kill Gorion.
Different outcomes yes, PIDs probably not, as she would neither become a real friend nor a romance. Tamoko is a cruel and cold person, fueled by as much ambition as Sarevok had and she is serving an evil deity. She is not *poor* Tamoko who was begging the protagonist for Sarevok's life because of her good heart.
She will be very much at odds with Sandrah if both are in the party. Her content will be mostly in SoD and she will never again meet Sarevok when he re-appears in later parts of the game. This is to ensure complete compatibility with all existing Sarevok/Tamoko contents from the vanilla game and respective mods.
1. Ah, I see. I though that whever there was so major change or/and addition it was the reason for a new official version.
2. Actually I thought that since Tamoko could(potentially) be convinced to give up on Sarevok meaning that she had some code of honor despite being of evil alignment and so I considered it cool if it was at least possible to befriend her as she and the PC were not antagonistic towards each other at all.
As for romance obviously I do not see courting her or listening to her life story as she does not seem as the type(from what characterization she got) but if taking her as the Neutral Evil character she is supposed to be I was wondering if she could not fall with the PC for either strictly a lustful relationship or to see him/her as worthy opponent type. Perhaps only for a evil aligned PC who can satisfy her ambitions and desires better than Saervok did. Granted one who is not as crazy as Sarevok was as it seemed a bit too much even for her(Sarevok's other lover was more ruthless and evil than her IMO).
At the very least a charismatic PC can make her abandon Sarevok which I doubt any guy who does not have a very strong infuence on her could pull it off.
Regarding PIDs I thought less about flirting but more asking her on what she think about the current situation or to convince for a specific course of action that could affect her loyalty to the PC or/and her fate.
A shame she won't go beyond SoD given that she is specifically for EET 
I see your points , but I try not to repeat myself in the stuff I do. I used a concept like you describe for the Caelar mod already, where instead of the NPC coming with some talk every hour or so, the player gets the options to question her directly, and then the conduct of the conversation opens more option for the next PID. I did not want to repeat the same again for Tamoko.
Tamoko comes with some secret that the player may or may not reveal. She has chosen Sarevok first of all because of his heritage and she swears loyalty to the protagonist for the same reason. She has little interest in the protagonist as a personality.
There are many good romance/relationship mods out there for the game. Myself, I am not trying to compete with those. My mods are more about the story and the background that surrounds the bhaalspawn protagonist. The PC is a child of his/her times, or rather the Time of Troubles when he was conceived and born. I see this episode as a major event that has shaped and influenced a whole generation in Faerun, not just those in some way related to Bhaal and his children, but many more who suffer or profit from the aera when Gods walked among the mortals.
In my mods I try to fill those characters with more life and their own stories. The protagonist is just one example of the *Time-of-Troubles-Generation.* and his path entwines with many others. I try to tell their stories rather than going deep into the personal relationship between protagonist with any of them. It is a different approach of how you can mod the game, not every mod needs to follow the scheme of 1) getting to know - 2) having a romance/friendship - 3) ending with an epilogue.
PS - Tamoko will be an EET mod not primarily because of content but because it uses the EET transition and NPC continuity features and will not work on BGEE/SoD. However, It also is supposed to be compatible with all the Sarevok related mods and so it injects contents into later events up to ToB even if she is no longer in the party by that time.
can't remember, it was a long time ago but anyway you have rough idea what it does... 
