Laelia milleri / Your opinion about repotting

[rbarata]

What would you do in this case, as it reached the pot edge?







As a side note, got this one almost 4 years ago. It has been growing one new growth each year but this year it-s the 3rd growth.
It never bloomed, in spite of full sun in winter and bright light in summer.
I've been doing some experiments to understand what's missing. This winter I'll keep it outside so that it gets temps lower than 10ºC at night.