I think it's weird to decide to vote one way or another based on the tactics of the campaigners for any given side.
As many have said, neither campaign has covered themselves in glory.
If she is a Eurosceptic, she would vote Leave, based on her Eurosceptic beliefs, not on Nigel Farage's nasty poster.
What fundamental thing has changed with the UK's relationship to Europe, to make her change her mind? There just isn't one!
Incidentally, I have heard her speaking on Radio 4, arguing for Leave, not so long ago. (Weeks, not days, though.)
I will vote Remain, but not because of the personalities on the Remain side, or "Project Fear" but because it's what I believe is better.