I don't think she's out of breath. I think audio is having RF drop outs from the mics. Her whole audio during Good Morning Baltimore had tons of drop outs.
I think this Tracy has the strongest /least whiney voice of any Tracy I've seen or heard. I think she is terrific. The production does lack some energy though.
You know, ma'am, ? there's nothing I wouldn't do for you. ,If there was a monster or an ogre or anything bad like that wot was after you, I'd rip it apart with my bare fists, I would. - Sweeney Todd
The energy thing is because it's a comedy and there's no laughter/response from an audience. That's always going to be a big problem for any of these broadcasts.