Todoroki didnt even know about Midoriya´s damage at first, so that´s not a valid argument. And I don´t see how two ice blast from the side would have been significantly slower.

This is such a weird argument. One time you complain about how this series forsakes logic in favor of drama, then you whip out your very own pseudo logic to explain why something isn´t possible. To which I gravely disagree. Nothing indicates that Todoroki couldn´ t create to quick ice blasts from the sides. Í´m sure he can also freely control fire blazes and quickly so, too. We won´t find out, because the fight´s over.