please comment

[iceicebaby]

Hi I bought four orchids about four months back.
they came wrapped in coconut choir as the first picture shows.

After a few months I noticed that the plants were looking a bit shrivelled.
So when I parted the choir I saw some dead roots in the center.

So I removed the outer part of the choir to allow more areation and for the water to reach when I water it.

I also potted one of them in charcoal after partially removing the choir.
Do u think it was the right thing to do?
PLease advise.