(Plus, remember that Thornling and Torchling are Shapeshifters in the vein of Morphlingplus, don't forget the power of Greater Morphling if you play Un- cards)
Unfortunately, to play it you have to discard 2 cards which is a huge cost
your commander is gonna be 1-2 punching people, doubling your mana is gonna waste a turn, and you cant do alot with the mana other then empty your hand, and then you get boardwiped and your sent back to your childhood
Copy an opposing dork that's really good, and smash first
On colour and in a draft situation it is hard not to play him as basically all planeswalkers that do something are good
Additionally, you can just ignore the deck-building rule and include creature cards with companion in your main deck