What I've always wanted for SMN / SCH is to see more WoL x Pet interaction via spells similar to Enkindle. It feels bad when pets are just...there like some automatic turrets.

I'm not so sure if we'll see more pet skills though, sadly. I feel like, at least for summoner, they will focus more on Trances. If anything they will probably revamp summons.
Also I think they should just get rid of pet roles (tank isn't needed at all, even for solo) and just make all of them DPS, just categorize them as either ranged or melee. That way if they revamp Titan-egi we might even get to use it more.

And for SCH I doubt they would add any new pet skills, they are already struggling enough with balancing the job cause of the fairies.