In addition to more pets. I think locks need some updated and more interactive abilities for pets too. Outside of demo, the base pets are using the same abilities since forever.
Like if I have my imp out and I do an aoe spell, they should do an aoe spell too. Is a shame imp still only has firebolt. They should have like a firebolt volley too.
Actually having more types of demons available it opens the door for adding some with different abilities. So some imps will be basic while others might have a volley spell. This goes for all types of demons.
I’m still waiting for a pet that does carrion swarm and chaos wave. If they won’t like warlocks have those abilities anymore, let them atleast get pets that have that ability.