According to the Missale Cartusiense (1981), which sets out the modern Carthusian form of the Roman Mass, when those holy religious celebrate Mass, amongst other peculiarities, they normally say the Eucharistic Prayer secretly (unless at a concelebration, for example), and for obvious reasons there are no Memorial Acclamations included in their form of Mass; also, at the end of Mass, the Carthusian priest still says the Placeat (in the form proper to the Order).
Now, in the new form of Mass drawn up for the use of the Ordinariates, a larger array of Traditional elements are now incorporated into this particular form of the modern Roman Rite. Most notably, at the choice of the celebrant, Mass may begin with the old prayers at the foot of the altar (strangely ending with Aures tuæ pietatis in place of Aufer a nobis), the former form of the Offertory may be used, and the Last Gospel may be read. The embolism after the Lord's Prayer follows the immemorial wording, although using the modern doxology; there is a threefold repetition of the Domine, non sum dignus; and the words of administration of the Sacrament closely resemble the traditional formulæ. Furthermore, rubrics direct the making the sign of the Cross at the end of the Gloria in excels is, genuflecting at the mention of the Incarnation in the Creed and making the sign of the Cross at the end of the Creed, and at the Benedictus, genuflecting again at the mention of the enfleshment of the Word in the Last Gospel.
Combining these noteworthy features of both variants, a list of desired options and reforms for implementation at Mass throughout the whole modern Roman Rite can be drawn up: it would constitute a real cross-fertilisation of the Ordinary with the Extraordinary Form, producing a new offspring possessed of hybrid vigour.
Ought not someone draw up a petition, and implore the Vatican to reform the liturgical reform by providing such a supplemented and corrected Order of Mass?