Repotting Oncidium Sharry Baby with lots of aerial roots

[Mountain Kat]

Planning on converting the Sharry Baby I purchased into SH. Flowers have just faded and I am really not sure if she is actively growing new roots. Her pot is a bird's nest of swirling roots and algae plus a lot of aerial roots. Do I repot now? And if I do, do I keep those aerial roots out of the pot? I expect they will just die in New growing environment. I know some are alive - they green up when I spray them. I would, honesty like to get them out of the way since they take up so much room.

Thanks!