On a recent podcast @vinny mentioned that he would like an option in the Dark Soul's universe to be able to summon in friends specifically, suggesting that a covenant could be joined to allow you to do this. In principal, I'm against the idea because I like the desolation and loneliness that comes from having to play on your own, only relying on strangers to help you (I think it'd be even better if they removed the gamertags of the people you were playing with to make this even more effective).
However, I thought it would be cool and fit with the theme of the game on one condition: if there was a second covenant you could join to invade all of the players in the cooperative one whenever you wanted (like how the Darkwraiths worked in the last game - using the Red Eye Orb whenever you pleased). These are two covenants where the concept of relative level ranges could be wiped away; meaning, if you could summon a friend to your game no matter how high a level they are, then you could also be invaded by someone no matter how high a level they are.
Playing with friends would make the game tremendously easier, so there must be an inherent risk there to balance it out (especially if level restrictions were removed for friends). I think this would be a really fun way to level the playing field, and also make multiplayer covenants still viable to players who want to max their level out, and not cap it at an arbitrary PVP limit.
Would you play in either of these hypothetical covenants? What other covenant ideas would you like to see implemented?