Oversight is being a bit generous tbh. But anyhow, I think the warlock engineer should have a warplock pistol. It is something that is very much needed because it is loreful and would make him more useful from a far. Also, it is a little frustrating that he has a voiceline that says "warplock loaded." Come on... that is just rubbing salt in the wound.
I would advise CA to at the very least give the arch warlock engineer (lord level warlock engineer) a warplock pistol, assuming they will give us a skryre lord instead of the verminlord (which is an actual army book lord and should be added first).