By “card extension,” I presume that you are talking about expanding the existing world game map? Funcom has stated several times (in streams, etc.) that the map is complete / done. No more map expansion is planned.
There is some real estate that they have yet to fully expand into. But I would not expect much beyond a cave here, or a dungeon there.
As for additional character levels - I do not know if they have spoken to this directly - but I believe that, too, is a finished product. If you are keen on more levels, I believe that there may be some mods available that address this. At this point, I am not sure what adding more levels would do except add additional gates for existing crafting feats, and potentially throw the game balance out the window by adding more attribute investment points.