As my mother told me: Don't borrow trouble.
Wait until they come in and then see if they work out.
Also, Harlicks are hard for me to tie. I found the laces more slick than my Jacksons. It's an easy fix. Get a cheap pair of gloves with leather fingers or grippy fingers (like riding gloves, or fancy gardening gloves, or golf gloves) cut off the tip of the first finger and then tie the boots with those. MUCH better than lace pullers. I had to cut the tip of the glove finger so I can sort through the laces while they're loose so I can pick the next lace to pull on, then use the middle and fourth fingers as the tuggers.
I would say, that once I get the right lacing routine, the right heel will settle in.
Also, one of my boots had a slightly warped sole. This is a common manufacturing defect that's an easy fix by shimming the blade. Make sure your fitter checks for that and fixes it if he finds it. I'm going to write a blog post on this because it's so common. And the issue is, that when a boot has a slightly warped sole and the blade isn't shimmed YOU FEEL IT ON THE OPPOSITE SIDE! It was totally weird. Anyway, probably not worth sending the boot back for a rebuild for it; recognizing it is the important part, then shimming it.
I have to say, the Harlicks recommendation that I need an extra wide tongue was wonderful, and the boot stiffness is perfect. Just wanted to add, Harlicks seemed to have put some pronation correction in the boots and that is nice.
I'm sorry that my posts spook you. I'm an engineer by trade and I LIKE being able to fix things and rambling on about it. Also, I don't know how old your daughter is, but there's lots of things you can fix yourself without a trip to the fitter (like trimming the insoles, or making your own stretcher, or figuring out different ways to tie the boots). If you're able to think through the problem, there's an answer to many boot fitting issues in your own hands.