I have an idea about how Beast-master calls out their pet, The first thing is we gotta get rid of all the Jugs within vana'diel that being said moving on. Now said Beast-master had to have charmed a petable mob in order to get that "Call" in their call list. This "Call list" works kinda like a Blue Mage "Spell list" but it doesn't use MP it uses HP on calling out pets.
This would allow Beast-master's all over vana'diel the luxury of zone with their pet out and not loosing it the loading screen and would save on inventory space issues and more!