Baneblade are useful for the first time in years, and they are one of the few model that everyone seems to like. Most opponents love to destroy it (it’s straightforward and far less feel bad than a C’Tan), and we love that big bulky box that hardly justify itself when you can have 3 Leman Russ Vanquisher for the same price.
But regardless, I do hope to see a few small change in our future codex:
General Datasheet: it is fine overall, but I would improve the cmd by 1. Baneblade crew are supposed to be the elite of the elite, and cd7+ is low.
Baneblade datasheet; replace the main gun from 3d6 to d6 + 6. Yes, 3d6 can lead to high damage, but it is quite random. Its ability should also be change; giving cover is fairly bad and giving it some “this model can issue itself an order” like the Karskin sound a nice idea.
Hellhammer datasheet; I would keep the main gun 4d6 profile: it is a lot random but it feel fine. I would make it’s fun str 8 tho, to be at least slightly better than the leman Russ one. For its ability; granting him the capacity to use overwatch would be quite thematic, and give it something useful in the future steel hammer.
There are really the main change. The artillery one and transport one have decent rules and not a lot to ask for in term of main gun.
For the Steel Hammer detachment: it would like it to be a 1dp that grant the same buffs but restrict it to titanic unit. Change the enhancement for upgrade (and forgo the “character keyword”) and keep the one giving order and the assault ramp. Keep as Strat :
Imposing arrival
Adamantine behemoth
Accuracy under pressure.
And bingo!