It is totally cool to go from dirt to hydro.
I prefer to go from dirt to Hydroton because you can fill your net pot around the roots. Take care washing the roots that you don't harm them too much. Also maybe a couple days before, if you can, water the plants in the soil with Hesi root compound or voodoo juice to give them an opportunity (sp?) to be full of rooting juice when they make the transfer. This is how it's done with mother's before cloning. Give the plant 2-3 days to suck up the rooting juice and then the cuttings are full of what they need, hence faster rooting...just my 2 cents...good luck!