And no, this will be illict after November.
There is no particular reason to think that. The children’s prayers were not originally part of the Missale. They were issued in 1974 in the vernacular (French first, I think), and then back-translated into Latin. The CDW stated at the time, “The Latin text is not for liturgical use. Therefore it is not to be merely translated.” When the Third Edition of the Roman Missal was published in 2002, the Latin texts were for the first time inserted, stuck into an index. By 2008, however, when the editio emendata of the Third Edition was published, they were taken back out again. Thus the new English translation, which follows the structure of the 2008 missale in all regards, will not contain them. Yet there is no indication that this removal was actually intended to work a suppression of the prayers throughout all languages, rather than simply to remove a non-liturgical Latin text from the Latin missal.
At any rate, since the prayers were not in the missal to begin with but issued separately, there is no very good reason to conclude that a re-issued missal which similarly does not include them will in fact operate to suppress them. The 2008 editio emendata does not say in Latin that they are suppressed, so a faithfully translated English missal will not say so either. And in practical terms, if, as it is alleged, the Eucharistic prayers for children are intended to be suppressed, it seems likely that the bishops would have begun to prepare people for this by making an announcement to that effect. Since they have not done so, I would think it improbably that they have any such expectation.
I have never heard these prayers, and I’m sure I would hate them. But people who convince themselves that they are going away – without any evidence, mind you – are probably setting themselves up for disappointment.