First of all I want to say thank you for the game, enjoying it a huge amount.
I just leveled up a primalist and it wasn’t until around the level 30-40 mark that I accidentally figured out that the A hotkey commands your companions to attack/move.
I know there is a tip for this on the loading screen, which I did not come across until later on; but I would like to suggest there be a small tooltip when you create a new character with the ability to summon companions. Like when you’re shown where to equip idols with the popup text box in your inventory, something similar to that.