I can't speak as to the experience of player RVT in Port as I have little experience with it. However, as a whole, the RVT really is not toothless in Port. However, Port is not Vallaki. The RVT adapts their methods to better serve their interests in a new environment. You might not often see assassinations and the roughing up of naysayers by the RVT in Port, but they flex their power in their own way. Throughout my entire tenure as a Gendarme the Port RVT has remained consistently a force to reckon with. They have a law firm in their pocket and it is laughably easy for any given RVT member to get a "get out of jail free" card because the organizations legal counsel shows up and makes it go away - and conversely, it requires Gendarmes to be extremely careful in how they actually deal with RVT members who have run counter to the law. There is a lot of "spy-vs-spy" going on in Port between the RVT and the other shady organizations that results in a lot of "if they do this because we did that, then we will do x y and z using the assets we've acquired previously." At least, that's my experience with the RVT: intense planning and playing the long con.
Now, whether any of this is reflected in Port RVT player experiences, I couldn't say. But it is there, in some capacity.