Repot or Not? Cym, Onc, Miltoniopsis

[VMStearns]

I feel silly asking, there is so much information that I've read already, but even after researching, I am still going back and forth on whether I should repot these three orchids in my collection. Mostly it is my lack of experience with the types. I have no problem with the Phals.

Anyway...I have a cymbidium (NoID currently in full flower) with roots and medium that is so dense in the pot, I can't use the skewer method. There are literally no gaps to slip in a bamboo skewer. This one will be going out for the Spring/Summer.

The Miltoniopsis (NoID nearly finished flowering) is stretching the plastic pot in multiple directions.

The Oncidium (Sharry Baby that flowered over the Christmas holidays) is either planted in a medium I don't recognize or the roots have completely covered the medium.

Here are pictures: