Q: A lot of players enjoy making new characters, but get scared of having to redo everything. Are there any plans to make Achievements, Minions and Mounts or even Glams account wide?
Short A: No
Longer A: There is NewGame+ if you want to play the story again, there are Fantasia if you want to change your looks and if you want to make a new char for RP get a level boost on the Mogstation
God that's really sad. Newgame+ and fantasia addictions are not a replacement for exploring the game as different characters.