Booker has always been a bit of a weak trash talker, and that will continue to be like that for a long time considering that's a bit about someone's character and not something about their talent.
Booker and Doncic's argument was funny, but it was clear that it wouldn't grow any further. As long as there is no physical violence in this regard, I find such quarrels amusing.
Phoenix was a really dangerous team, as you all said. Having both Durant and Booker on the team offers more offensive options. They became one of the duos that scored 35 points each. It's hard to defend that. A healthy Phoenix will pose a threat to all opponents.
It wasn't between Luka in the first place but was Kyrie at the end of the game but I think it's not something Luka will just pass by considering all that trash talking. I think they have little thing like this with Klay too and I think Booker was a trash talker in the first place. Well, can't say for sure but they have to prove that in the playoffs.