I think some people do grow Phals in terracotta pots, so I think it would be OK.
I'm guessing it may mean you have to water more often.
Having said that if you are happy with how to water with clear pots (just like me) you probably are best to put it in the sort of pot you like, rather than risk over/under watering in an enviroment you are not used to.
If it was me I would repot within a month or so, just to get it into an enviroment I am used to dealing with.
