I think having the option of creating permanent one-way portals could be useful. Probably easier on newer players too.
For example, if someone has a public mine, they usually have a portal set up to a hub. There’s no room/want to offer personal portals around that one, but if miners could take/create a one-way portal to connect to the main one that is already set up, everyone could just travel to the one main portal. When they want to leave, they can just go to the sanctum to travel home for free, or where ever else they’d prefer to go from there. (just using mines/miners as one example)
I think this would also be great for events, hunt gathering locations, tourist attractions, etc.
Two-way portals still serve great purpose & would remain as they are.
One-way portals would just be a new additional portal type/option. Maybe they have a different cost requirement/fuel?