I’ve said this one about a year ago.

Tav needs to be an “origin” character. Cause as you all have said, he currently is just a placeholder to placate us as players. I remember in the OG BG series when WOTC basically said the whole thing wasn’t cannon. The community of gamers went nutso. This is pretty much the same. Your Tav will not be a cannon character. The only ones to be cannon will be the origin characters.
By making Tav an open build Origin character with his own customer dialogue (though admittedly vague and generic) and event situations would he even have a chance of being in the upcoming lore.

Some of y’all have already pretty much said this. What I mean is that like the other origin characters etc, you can play, Tav needs to be an independent option in the game if you don’t chose him at start (choose to let’s say play Wyll’s story. Granted Tav’s story will not be a s fleshed out because he will be basically the default generic character.

The “who are you scene”, could pop up and you would choose to play Wyll, then chose your dreamer, and then either randomly generate a Tav or make one of your own. This way you can set him up as any type you want. Don’t like Asterion? Tav will have been premade as a Rogue. No origin bard? Will Tav is one now. In these cases Tav would not be the main character as you are playing Wyll. But he will fill a vital role as the mystery origin character in the cannon game. Maybe the one that ascended to what ever the ultimate fate that awaits the dragon bor… Bhaal Spaw… uh true souls yeah that one…

Just my two cents.