Porzingis has it all. Size, athleticism, touch, a little grit or edge, but to date, he has not put it all together. But even with that, he has a career average of about 20 pts/8 Rebs. I feel like this is the time that he is most likely to put it all together. This is the right time, the right team, his peak age, all of it. If he is ever going to get to the next level, it is now or never.
And even if he stays the same as he has been, he is still an upper tier big. A potential all-star. He is not Jokic or Embiid or Giannis, but who else would you put absolutely ahead of him? Towns? Davis? Randle? Sabonis? Markkanen? Zion? Adebayo? I think Porzingis is right there with any of those in the second tier and on the Celtics, might be the best of that second tier (Zion being a bit of a wildcard).
I will always be a big Marcus Smart fan but I like this trade and am glad to have Porzingis.