First off - I wouldn't care about what other people think. It makes sense for you to continue dd's French since she already has a foundation and you speak French too. What doesn't make sense (and is pretentious IMO) are the parents who speak zero French (e.g. Madonna), and put their kids in the lycee without giving them some kind of extra support.
The Anglophone families (and there are quite a few who share similar backgrounds or are francophiles) I know whose kids have thrived at the French school are those who either have 1 parent who speaks French consistently at home, or have a French tutor/au pair to help, and who spend regular long holidays in France where the kids are immersed in French e.g. kids clubs etc.
The issue of language acquisition is a huge personal project that requires commitment and self-belief (and work!). It is thus impt that you n your partner talk thru' and agree on your objectives with regards to the level of fluency you'd like dd to achieve. It seems that you'd love dd to be fully fluent but partner is less concerned. That's potentially a big issue.
If you'd like her to be fluent i.e. literate, then schooling in French is impt. The casual few hours a day may not be enough as eventually she'll realise French is a "minority language" in her life and she won't take it seriously or might even resist it as it's "different". This is what is happening to my kids with Mandarin - my language.
The bilingual stream is ideal if you honestly believe your child has the aptitude for it. Good concentration, can read well. Having said this, many of my anglophone friends have decided to keep their kids in the fully French section as they feel that their kids get enough English at home but not enough French. We opted for the bilingual stream on the advice of my son's teacher who felt that as a child who was already living in a multi-lingual family, it was a more natural environment for him.
Good luck on your decisions. In the meantime, I would start looking to get onto the waitlists quickly. And despite the hard work, it's incredibly satisfying to see the kids slip in/out of languages, friends, cultures with such ease and self-assurance. It really is worth it