I don't see how an open rook file would not be an advantage.
any extra pressure is pretty negligible being on the outside
What do you mean by "being on the outside?"
My reasoning is you're going to be down a pawn, but your rook is going to be so much more valuable with the open space to operate. The only downside I can think of is exposing the king if you are to castle to the side with the missing pawn. This downside can be avoided pretty esaily however by castling to the other side or just not castling at all.