My experience with phals is not very extensive but are you sure that's a spike, it looks a little too green to me? The media doesn't look too bad. I don't know what the reason was for repotting besides checking the root system after you got it and the untidyness. I'd just keep it in this media unless it's really in bad shape. I've had roots starting to pop up right after repotting and that's what I suspect is happening now. Anyway, the plant looks healthy to me. I'm sure other members have better advice for you than me though.