Making Up Worship Rituals
If any such ritual is undertaken at an individual level, there’s nothing objectionable in it as long as it has no shirk or another immoral aspect. However, if someone presents such a practice as a part of religion, then it is considered an innovation. As far as I know, learned sufis do not consider the whirling ritual as an act of worship ordained by God. It is considered a customary meditation practice said to have originated in the time of Rumi.