Also, what were your reasons for taking her out? Whether educational or social (and you say she is happier), there may be some trauma she is getting over. She needs time to do that. If she has always been a high achiever, then she should start to do things - but perhaps not if she (feels she) is being pushed into workbooks.
Many EHE kids seem to get into learning Japanese following an (obsessive) interest in manga.
Does she (or would she like to) play an instrument? Now she has time to try things out. Can you get her involved in cooking, shopping, etc. All the "hidden" work that goes on at home which she didn't see before because of school, homework, etc. she can now be part of. And you know it's important because the government is talking about adding it to the curriculum. :)
BTW, my two (now 16 and 18.5 and always EHE) did nothing much formal until they started Open University courses at 13-14yo. DD is in university studying Law on the strength of OU courses. She says that many of the others are reluctant to speak in tutorials or lectures and have no idea how to prepare and deliver a presentation. In her first assignment, she was in the 52% who scored the middle grade band, but with a score towards the top. All the stuff about not learning to get up in the morning or to turn in work on time if you don't go to school for 13 years is a LIE!!!
In fact, I think that being able to choose what she wanted to do for those 13 years and to organise her own time has given her a great grounding (more than I would have said 6 months ago) for university. My socially inept child has turned into an adult who is arranging a house-share with a group of friends and is helping others to fit in. Home education rocks!