For a TI qualifier that was played soon after the introduction of brand-new mechanics like Hero Facets, Valve can be happy that teams banked on the viability of almost all heroes of the roster, barring two.
The two unpicked heroes from Dota 2’s 125-wide hero roster are Omniknight and Riki. While both of them have been historically known as pub heroes rather than professional picks, their treatment in the large 7.36 gameplay patch and its subsequent letter patches didn’t help.