Hypothetically if we traded Brogdon in the KP trade, then I personally don't think Brad would have traded Smart in the Holiday deal. He might have just kept Timelord + Smart and rolled with the same team + Porzingis. But I also think Brogdon clearly soured on the organization after the whole trade drama with KP originally, so CBS probably decided to trade him and Timelord who is injury prone.
I still think if the Clippers didn't balk out of the Porzingis deal involving Brogdon as originally set, we would not have Holiday and would have kept both Timelord + Smart. Brad really had to shuffle around though after the Porzingis deal originally fell through due to Brogdon's "medicals".
I actually would have been fine with it though if it did end up like that. No Holiday, but keeping Smart AND Timelord in addition to the Core 4 (Tatum, Brown, White, Porzingis; Horford as well)