We should wait for new patch, that is sure, and then discuss in details about heroes, their roles and possible new hero with missing role (if it will be needed).
While other 2 dwarven factions have 6 regular heroes, IH stands with 4.
Ofc, IH has some benefits which are for now used as reasons why 4 heroes are enough.
In my opinion those benefits are not strong enough reson, or to be honest I think IH need some final polishing in units/hero_roles system, so it could be in rank of other 2 dwarven kingdoms. That is probably matter of discussion with betatesters etc, and I just mentioned it as possible future discussion.
Concerning "missing" hero for IH, I am strong supporter for Narin.
I still think that current single scouting ram rider unit is something which couldn't be comapred with scouting hero. Those single ram units are something very nicely implemented in game for now, but they can't be compared with scouting hero.
They have speed and with it the best scouting ability in game, but that is all. Creeping abilities are almost 0, and that is main reason why this ram units couldn't be compared with scouting hero. I know that main purpose is scouting, but starting heroes also could be used for some elementary starting creeping and as starting unit supporters in early game. Single ram ridders can't do this, and this is main rason why I think we need scout hero. Narin for now is developed nicely in lore term, only non lore thing about it is his name. I like Narin, because it has been used from start of developing process, but some Kazdul (I call Khazdul fans to help) name for messanger also could be used. His abilities also could be reworked in term of need etc.
Concerning other possible new heroes, I am completely against chariot hero for now, although I need to read that topic in more detail way so I could speak more about that solution. For now that idea sound me more like some part which could improve our battlewagon impovements topic or to be fused with it somehow in final moment.
Captain hero sounds interesting, but for futher development, we should wait for new patch. Dain is for now strong unit supporter, so from that point of view I think captain as unit supporter (as completely new hero with that role) is unnecessary.
I have to express my agreement in one part of Odysseus's view that we could also make new outpost's hero from Dragonslayer. That unit is already strong as mini hero, so some development into completely new Outpost hero also could be discussed.
As I have said, this IH matter in my opinion deserves some serious discussion in order to give final tune to faction as whole.
Greetings,
CragLord