It was a surprise. People were betting against him when he faced Innovation in the quarters, as that guy was known for winning PvTs, so I guess there was a ton of money to be won
Innovation was a clear fav, based on Zest's recent performance and their overall skill level. The series were super close and i would say Innovation underperformed, and on the most days he would win that best of 5.
However current metagame makes PvT a pretty variance heavy matchup due to the fact that Protosses that a lot of builds in their arsenal that can straight up win the game against Terran.
When these builds fail - its an easy win for the Terran. So there is a lot of luck involved. No matter how good you are, you just cant prepare against everything. You have to make an educated guess.
The line for Inno-Zest was actually pretty sharp, in my opinion there was some value on Innovation when it opened and before the steam came, but not much.
A very marginal EV spot eitherway. But its always easier to judge things with perfect hindsight.