My suggestion is very simple:
I would like to see an option to add the non-combat-pets to the hotbar.
(Like that crystal from the quest that follows your character)
It’s so nice to have them around, but after relogging there should be a better way to summon them, than opening the inventory and right-clicking them everytime.
Of course its just a minor inconvinience and not that important,
but in my opinion it would be a nice thing to add 
Thanks for reading and have a nice day everyone!