being a better speaker is already an advantage in our present system. "I don't know what he said. I don't think he does either."
having hours upon hours and days upon days of adversarial interrogation by the other candidates Will take us as far as is physically possible toward minimizing The impact of that bias relative to the impact of the bare facts.
Will this change people? absolutely that's the whole point. we want them to be statistically representative in terms of their intrinsic preferences, not their instrumental preferences. we want the electorate to get what they would have gotten if they had all gone through the same process.
Will this make people tune out of politics? God willing. why should anybody have to care about how their computer operating system is working? they just want it to work. and an ideal world we barely even talk about political issues. we know we have a process that matches policy to our collective well-being as accurately as is humanly possible and we pity all those countries using democracy and getting the kind of chaos we have now. we don't have anti-vaxxers running HHS.
it's hard to say whether the public would react negatively. I haven't been able to find any negative public commentary about election by jury in Georgia. maybe we need to give people a few things they still vote on to address this. kind of like giving your kid a toy steering wheel dor the car.