I'd like to think that there'll be some kind of porta-pet feature for hunters someday. And yeah, warlocks can do it, but it costs us one of our soul shards to call out a fresh one. (Except for the imp.) And that means I have to waste a whole bag carrying nothing but shards so I can summon demons, summon party members, cast certain spells, make soulstones and healthstones, etc etc. So I wouldn't wish another wasted bag slot on hunters, if that was what it would take. :V