Maxperson
Morkus from Orkus
They've mentioned Ta'veren several times in the show, starting in episode 1.I also don't like little changes like Loial not opening the Ways, or no mention of the word "ta'veren" (although that may still be coming).
They didn't know that, though. In the age of legends, nobody remembered any prior Dragon, so Lews Therin was the Dragon, not the Dragon Reborn.One could argue that, given the cyclical nature of tie, Lews Therin was also a Dragon Reborn, but that the "Dragon" is reborn at the end of each Age.