Funny, I didn't notice Jonathan having any difficult today. But as you say, it just may not have been that obvious.
At this point in their relationship, I don't find it so odd that Barnabas didn't give Julia a hard time about Maggie. He's human now. Now the old, vampire Barnabas would have been bitching at her without a doubt.
I liked how for once, he was willing to take the responsibility for what's gone wrong. That is definitely a big step forward for him.
Supposing Maggie had gotten out and gotten to the police...would they have believed her? Or would they have thought she was a loony, as Willie had suggested?