So I'd rather see 3 and zero. I think it's much better to make sure a potential medallist (top 3) is guaranteed of advancing.
Actually, with 26 entrants, I'd personally rather just see 2 heats. Run a two turn stagger and it will separate itself out but that would be pushing it.
Speaking of heat 3, look how loaded heat 3 is - Hassan, Seyaum, Houlihan and Arafi.