Thank you for the thank you. It's a sign of your professionalism that you can consider changes without getting defensive (I'm not there yet - childish of me, I know).
On the subject of Caro being a badass/person with underworld connections. Assuming you have a plot reason for not revealing this early on, you could pepper her dialogue with words that make the reader sit up and take notice but don’t give too much away. To be specific, words like ‘Crowbar’. As in when Neil won’t open the door ‘Are you going to make me get the crowbar?’ (doors can be levered open by inserting a crowbar in the hinge side). But any impactful words that hint there is another side to her would do.
I like the way you think, Heather. I'll bear that in mind. Caro's technically reformed now, but her past was very shady, so I'm guessing crow barring a door would not be beyond her. And I think maybe you're right, that would make an interesting interplay between her and the mousy Neil make her one of the 'extraordinary' characters Harry talks about.
As for taking criticism with good grace, well, thank you. It can be tricky, especially if people don't get your writing, don't appreciate something you've worked really hard on. But Townhouse people are serious about writing, so the advice given is worth listening to and often invaluable - like yours! Thank you again 😀