Exactly. Venue change request is only cumulative, i.e. to show that this is something that they had tried in order to get a "fair trial by jury of one's peers" - that that could only be done in other venue - and that it had been denied to their client.
Issue of not allowing defense to examine witnesses, just because Libby didn't take the stand as is any defendant's right, is another big hole in this trial as denying defendant "right to a fair trial", that should play on appeal.
There are a lot of other solid appellate issues with this trial, I'm sure they will have appeal ready before the sentencing on June 5.