That's actually a very good looking specimen. The aerial roots look great and I wonder if the plants at this stage have become totally dependent on them. If they have, and the aerial roots are buried in fresh medium you might risk rotting all of them because their accustomed to being exposed to air.
Others might disagree, but I'd unpot the plants and check on the condition of their roots that were buried. If the buried ones have all rotted I'd be inclined to believe that the plants have gone completely aerial, and I'd repot them loosely all together in a large wooden slat basket with large chunks of bark, charcoal, and aerolite. I would not remove the spikes and I'd mist the roots once or twice a day, taking care to avoid watering the crowns.
I would only choose to repot the customary way if there are many viable buried roots. In this scenerio I would remove the spikes to prevent stressing the plant while it adjusts to the new potting medium.
Good luck with whatever method of potting you choose. That bunch of plants is going to look awesome when in bloom.