I have the same skis and I love them. I am a couple of inches taller than you, and firmly ‘mid-size’ (US size 10/12), so I have quite a bit more body mass than you do.
I love the weight and stiffness of this ski, it is just about perfect for me as a high intermediate/ low advanced skier. In contrast, a similar waist size in the Nordica Santa Anas was too much ski for me. Just too stiff and too heavy.
I was on a terrible pair of noodles before, that chattered badly and literally slipped out from under me. They were a narrower waist, so it did take some adjustment to the width of the BPs during the two days I was demoing them.
After owning a pair of BPs for 14 days of skiing (and counting) I love how they feel so solid, stable, and like they are there to support me when I really need them. They are fantastic in mixed conditions, and in fresh snow, and on soft bumps. I have not taken them into deep powder. I do suspect a narrower (but sufficiently stiff) ski would be better on ice, though the BPs still handle it well, and better than the narrower, less stiff ski I was on before.
It did take some time to get used to doing shorter turns on them, but now they feel great on those too. And I think the most fun I had on them was a day when it was snowing and I was bouncing around soft bumps like a happy bunny rabbit. I had never enjoyed terrain like that before.
A lesson would probably really help with dialing everything in. It is a big shift from straight skis to the BPs.