If they still have no intention of tasting the dishes, I was thinking that Soma would somehow persuade the judges to taste his cooking even if they had no intention of voting in his favor. Since they planned to vote against him from the beginning, there's no harm in trying his cooking <-- Or some other reasoning along those lines.
Well I tried to explain that in my previous post. Eizan could do nothing at all and still win because the judges are on his side, so for him to be cooking seriously is rather redundant. But he said it now, didn't he? That he will have to submit Soma through cooking, so even if he cooks seriously, if the judges choose him because they're biased, well that would void his intentions. He wants to break Soma through his cooking and for that to work the judges have to be fair otherwise it would be meaningless.
Eizan's urge to crush Soma reached a point he actually got sucked into Soma's pace and by that pretty much allowed this to be turned into a regular Shokugeki. At least that's how I'm seeing at this point.