I think you just nailed it as to why she obviously doesn't want to testify under oath and no one has seen the unredacted letter. Discovery is a bitch.
I haven't heard your point from all the news/opinion pundits as yet. I think you've called it. She has nothing other then names she can claim. If those names say WRONG (like the 3 she has already named), she is open to liable suits. Her lawyer[s] handlers are twisting their minds into pretzels to work around your point.
As for Grassly now putting it off until Wednesday, he's a punk and being played by his own Stupid Party.
I disagree with your last statement. Politically, the best thing Grassley can do is run this thing out for days -- even weeks.
The scenario that absolutely works best for the GOP is to have Ford decline to testify in a very public and embarrassing way ... but only after her lawyers have made every pathetic attempt to make excuses for why she can't meet the GOP terms. She's afraid to fly. She's afraid of confined spaces. She only wants one camera and ten reporters ... no, make that three cameras and five reporters. She wants Kavanaugh to go first. She only wants black Republican senators to question her -- and only during Ramadan ... blah, blah, blah ... until one day she decides to set herself on fire outside Dianne Feinstein's Senate office in San Francisco.