Too bad it's not the Tasha's version of Beast Master, that fixed all the problems.Beast Master 22 - 2 = 20 Dar of Emur, you are not.
It includes Tasha's changes. The Beast Master subclass is from PHB, and is not in included in Tasha's. What is in Tasha's is an Alternative replacement ability for 1 subclass feature for the Beast Master. Just like the Ranger class is in the PHB with some Alternative abilities in Tasha's, the Beast Master is in the PHB with 1 replacement ability in Tasha's along with the available Beasts to choose with the new ability.Too bad it's not the Tasha's version of Beast Master, that fixed all the problems.