I've no idea whether RR is a good economist or not, because that isn't my area of expertise. We will have to wait and see.
However she has shown no foresight in the setting up of her new regulations, many of which are creating havoc and confusion.
For example, her guidance on the 20% vat on school fees was inadequate, and HMRC is in real chaos. Schools are having difficulty even registering for vat and their numbers for the scheme have yet to be allocated. Invoices need to be prepared now, but advisors at RR's office seem unable to come up with the answers, and the whole system is in disarray.
It seems to me RR is very good at telling us about her new plans, and introducing them at great speed, but very poor at having any idea how to implement them. I give her a 4/10 for organisation and groundwork.