While im fine with new ships and before i give any fun ideas. Could we please update existing ones to be more useful, like Navy Battleships and some of the navy cruisers?
There is an EASY 8-12 ships to rebalance and inject some fresh fits into a languishing battleship meta. Combined with things like the navy caracal being garbage and stabber fleet not far behind. Id be much more vocal about updating those ships, than adding new.
However, that being said. For the creative experiment of your post, here is my idea:
T3 or T2 Attack Battlecruiser:
Fits battleship sized weapons
Medium to below average EHP (70-80k EHP max)
Specialized at killing caps, weaker to subcaps. Would not have range bonuses.
If capitals are going to continue being FOTY. There need to be more subcap options to counter them. Trig meta/100mn only meta is boring.
The intention is not to make these so powerful that they insta-pop caps, but that they are very strong against unsupported capitals, but die to subcaps easily. So they have a low sig (for a BC) to help mitigate fighter damage but are for the most part, still glass cannons like t1 ABCs and easily tracked by medium weapons.
If T3, they would have mode switching like T3D.
Speed mode: increase speed and reduce mwd sig bloom
Sharp shooter mode: increase tracking and scan res/sensor strength.
Assault Mode: Increase damage 150% (or more), reduce tracking by 95% and reduces your speed
If T2 (Assault Battlecruiser)
They would be low sig, moderate speed battlecruiser with a HAC role mwd sig reduction bonus. ADCU is optional on if it should be included here.
Youd have the same large weapons as T1 but have a module/hi slot to increase damage with the loss of tracking and speed (not 0 speed, just slower and easier to hit by subcaps).
End goal is to have dps around 2500-3k in this assault mode. Easy to exit a WH and pounce an unsupported ship or go roaming in with a gang. Not as good in fleets as a ferox fleet will overwhelm a fleet of these. As theyre t2/t3, they would not trade well from an ISK perspective.