I think these are two very evenly matched teams, up and down. I don't buy the conclusion that the Heat are clearly inferior. Or if they are, they are not by all that much. At least not so long as Herro and Robinson continue to play the way they have.
I think that historically, as the playoffs/series get deeper and the pressure ramps up, younger guys tend to feel it more than veterans. Now Duncan Robinson (born York, ME, attended Williams College) is 26. He is actually older than Brown and Tatum and the same age as Smart. This is his second year and I think his first playoff experience but being 26 is a lot different than being 20 like Herro. I will be curious how these two guys hold up as things progress in the series.
Our key young guys, primarily Tatum and Brown are young but they have an unusual amount of playoff experience, and experience being a key player, for such young players. With the ability to lean on Walker and now Hayward as veterans, I hope these guys to hold up and continue to play well. To me, that is a key part of the equation with Hayward, he is a solid veteran and helps us to equalize the experience advantage that the Heat have on us.
My prediction now is that Herro and Robinson will falter some, Dragic, Crowder, and Butler will continue to play well as veterans, but now with Hayward back and the novelty of the zone starting to wear off, advantage Celtics. Slight advantage though, this could still easily go either way based on a couple of lucky shots or a call or two by the refs. I see things as that close.