Even in the various different Western Rites, and even in the various different forms of Mass used throughout history, I’ve never heard of ANYBODY holding up a ciborium during the Consecration.
What you do get is a lot of different ways to set out the ciborium on the altar during the Consecration, or the Mozarabic thing where they would lay out the hosts in a cross shape, or giant hosts that were fractured and then laid out in a certain pattern. There have also been times where people were raising the host so high at the Consecration that they got told off. But they were still holding up just one naked host during the Consecration.
Breaking away from holding the Host is a Really Big Deal, because it breaks away from the most ancient priestly traditions in the West.
Now, there are various Eastern Rites where the entirety of the eucharistic prayers are regarded as the Consecration, so this isn’t a question. They do things differently, and good for them. But if you’re not saying Mass in one of those Rites, you can’t really use their example. Apples and oranges are both fruits; but you don’t eat an orange by chomping down without peeling it, and you don’t eat an apple by pulling apart its sections.
So in re: holding onto the ciborium like it’s trying to get away, or raising it up like a big bucket you’re going to dump on somebody, I can’t really see where this would even come into play!
(Unless you’re talking a concelebration where the priest is standing out in a crowd somewhere, and the main celebrant is intending to consecrate all the hosts on the altar and all the hosts out in the crowd. But if that’s the case, the concelebrant out in the crowd should be listening to his instructions from his bishop and from the Vatican on concelebration, not a bunch of us on the forum.)
It sounds to me like these priests are having a weird aversion to the old rules about the host being held in your thumb and forefinger, at the exact time when laypeople are being asked to take Communion in the hand ALL THE TIME. Do they think they are less priestly than laypeople? Seriously???
If priests are going to shy off touching the host with their actually consecrated hands – the very hands which were anointed to the service of the Lord – then either they are germ freaks or they distrust their priesthood. If God’s gifts particular to the priesthood aren’t good enough for them, they are really in need of our prayers, because they were badly taught or are suffering a crisis of faith.
(But if you don’t understand why you’re doing something, you look it up, and then you keep doing what the Church does. You don’t just say, “Oh, yeah, I’ve decided to say Mass wearing giant Nomex firefighter gloves so that I won’t have to wash my hands,” or even, “Because I’ve decided it will remind people not to go to Hell.” You’re supposed to want to do what the Church does, not just make stuff up. It’s a violation of the Church’s rights, including the rights of your parishioners to have a real Mass.)
I hope I haven’t been too harsh here, but it’s a shocking thing to want to do.