Not allowing you to port medal is a design decision to get players to build out into the world instead of just throwing up portals all over the place. They could make it optional but chose not to. Bugs...for an early access game, this one was pretty solid. As for the rest, you bought the game, you got more than your money's worth, they don't owe you anything. If they fall down on getting Hearth and Home or any other additional content out, then they won't sell anything more and Valheim will fade into obscurity, though it will always have a niche market for survival game enthusiasts.