Good luck, you have a good lot of healthy root there so hopefully it will do OK.
Just a word of warning and I don't mean to by glum... but I have only ever bought 4 orchids in those polythene pots packed tight with moss (just like in your earlier pic) and all 4 died despite my best efforts and all within a couple of months (I usually have no problem with Phals and have loads of healthy ones both before then and since).
On 2 of them I repotted as soon as I got them home (into bark) on 1 of them I pulled out some of the moss so it had more room to breath and the last I repotted in fresh moss... all of them lost their roots and then died. The one I repotted in fresh moss lasted longest but even that died.
I now never buy them in those polythene pots. I still buy NoID's sometimes in the supermarket but only when they are in bark, I avoid the polythene pots however much I like the flowers.
I think the problem is that the roots are not adapted to the drier conditions of bark, or even moss drier and airier than they are used to. It comes down (I think) to what Ray talks about which is that roots grow to their conditions and sometimes don't do well when those are changed. The problem you have is that the roots aren't doing well in their current conditions either.
Again I'm not meaning to depress you, and I encourage you to do all you can for this guy, because maybe I've just had bad luck, or maybe the ones sold this way in Europe are already in worse condition than those sold this way in Canada. I just want to warn you that if you do find this guy fails don't blame yourself!
One thought I have though... how about using Lecca and S/H growing. This method keeps the roots a lot wetter and so roots used to very hight moisture would possible adapt better to it.
because I'm only just experimenting with S/H myself.