At the very end of Words of Radiance, Dalinar touches a Shardblade and it screams at him. Shouldn't that particular Blade have been safe?
No it should not have. It's a clue that something has happened.
[This is] a question that the subtle reader should be asking. And there are other clues that something is wrong with what the story you've been told is.
Because Option 2 is that it's unsafe to touch an honorblade, but there's no evidence of that.
There is no evidence of that. In fact there's much stronger evidence that something else is going on.
Did Hoid switch out the blades?
Hoid did not switch out the blades, but good question.