With regards to your original question, Juan, there is no right answer. It comes down to what is "best" for what you want.

If you would like to have a large more specimen-sized plant which will be likely to provide you with a large impressive floral display when blooming season arrives, then do not divide it. Instead, simply pot it up into a larger pot.

If, on the other hand, you feel that undivided it would take up too much space; or you wish to experiment with two different growing medias/methods (like mounted verse potted, or bark vs. rock, etc.); or you would like to have a division to sell or trade with someone you know; or simply would like to have two pots of this orchid to display in different parts of your yard or home then go ahead and divide it.

It's all good.