Repotting a laelia...looking for advice

[Louise]

I have recently received a Laelia Tenebrosa Valpota's night in bloom. Now the bloom is over and this plant needs badly a repoting because the medium (bark)is old, compact and all covered with seaweed. the plant also need repotting as the last grow is too close to the border to let new roots growing inside the pot.
Usually I only repot cattleyas and laelias when new roots are growing but this time I wonder what will be best for this laelia : repotting now because of the very very poor medium or waiting for new roots.
What do you suggest?