Sion unit has no equipment?

Is there a way to get the Sion unit to use equipment?  It won't let me edit the design and give him some, and it won't let me trade equipment to him from my sovereign.  Since the Sion is supposed to level up like a champion but without spells, shouldn't he get equipment?  Or is this just an incomplete feature?

Also, I used a town improvement so trained units begin at level 2, but the Sion did not receive a perk for his free level-up on creation.