Quote Originally Posted by Potato_Priest View Post
It's basically the same as the beastmaster ranger, except you get a way better animal companion. Thus, comparing it to the closest thing around (the beastmaster) it's definitely overpowered. One almost wonders why you don't just reskin the beastmaster to fit this more mechanical theme.
Because the beastmaster is underpowered and deserves to be shunned.

A beastmaster ranger at level 5 can command their wolf to make one attack, by forgoing one of theirs. The Tinker Ranger can command their brown bear to make two attacks for way more damage, by forgoing one attack of their own.
A beastmaster can make their wolf make one attack while adding your proficiency to it's attack and damage rolls. A tinker can make their brown bear make two attacks for roughly equivalent damage.

At level 11 the beastmaster ranger can command their wolf to make two attacks, by forgoing one of theirs. The Tinker Ranger can command their Polar Bear to make 2 attacks without forgoing anything.
A level 11 beastmaster can forgo an attack to have their wolf make two attacks. A tinker can forgo nothing to have their Polar Bear make two attacks, for roughly half the damage.

Basically you seem to be forgeting the massive boosts a Beastmaster's pet gets.